American Idol: Chris Martin introduces the 'slut bang' while mentoring Chayce ...

Chris Martin may have just introduced a new word into the American Idol lexicon: 'slut bang.' On Sunday's episode of the show, the Coldplay frontman, 44, admired the sleek hairdo of contestant Chayce Beckham, 24, urging him to manufacture 'Chayce Paste.'

He then suggested the heavy machinery operator bring one lock down in a 'slut bang,' a la Johnny Depp in the 1990 film Cry Baby.

The hair styling advice was one of the highlights of the show that also saw the Top 7 get whittled down to the Top 5 with two singers ultimately sent home after Sunday's two-hour episode. 

Chris' term: Chris Martin may have just introduced a new word into the American Idol lexicon: ‘slut bang.’ On Sunday’s episode of the show, the Coldplay frontman, 44, admired the sleek hairdo of contestant Chayce Beckham, 24, urging him to manufacture ‘Chayce Paste'

Chris' term: Chris Martin may have just introduced a new word into the American Idol lexicon: 'slut bang.' On Sunday's episode of the show, the Coldplay frontman, 44, admired the sleek hairdo of contestant Chayce Beckham, 24, urging him to manufacture 'Chayce Paste'

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Cry Baby: He then suggested the heavy machinery operator bring one lock down in a ‘slut bang,’ a la Johnny Depp in the 1990 film Cry Baby

Cry Baby: He then suggested the heavy machinery operator bring one lock down in a 'slut bang,' a la Johnny Depp in the 1990 film Cry Baby

The little-known term for a loose forehead tendril was first referenced in a New York magazine article last year. Chayce, a native of Apple Valley, California, declined Chris' advice to change his 'do even though the night was all about Coldplay's songs. He still soared onstage with Magic, the band's 2014 hit, and was so good that Chris 'forgot to mentor him at all.'

Like many in the cast, Chayce was impressed with how humble their temporary mentor was.

'I'll remember this day forever, and the way that he treated me and the way that he treated everybody here,' Chayce said.

Advice: The little-known term for a loose forehead tendril was first referenced in a New York magazine article last year. Chayce, a native of Apple Valley, California, declined Chris' advice to change his 'do even though the night was all about Coldplay's songs. He still soared onstage with Magic, the band's 2014 hit, and was so good that Chris 'forgot to mentor him at all'

Advice: The little-known term for a loose forehead tendril was first referenced in a New York magazine article last year. Chayce, a native of Apple Valley, California, declined Chris' advice to change his 'do even though the night was all about Coldplay's songs. He still soared onstage with Magic, the band's 2014 hit, and was so good that Chris 'forgot to mentor him at all'

Forever: 'I'll remember this day forever, and the way that he treated me and the way that he treated everybody here,' Chayce said

Forever: 'I'll remember this day forever, and the way that he treated me and the way that he treated everybody here,' Chayce said

Katy Perry, 36, told Chayce he had that 'Chris Martin magic,' calling the two of them 'equals.'

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'The only thing I missed was that strand,' she noted, referring to the slut bang. 'I stand for that strand… #StandforStrand.'

The evening's show saw the Top Seven narrowed down to the Top Five, and Chayce was among those who made it through. Casey Bishop, Caleb Kennedy, Grace Kinstler, and Willie Spence rounded out the group, while Arthur Gunn and Hunter Metts went home.

Equals: Katy Perry, 36, told Chayce he had that 'Chris Martin magic,' calling the two of them 'equals'

Equals: Katy Perry, 36, told Chayce he had that 'Chris Martin magic,' calling the two of them 'equals'

Stand for Strand: 'The only thing I missed was that strand,' she noted, referring to the slut bang. 'I stand for that strand… #StandforStrand'

Stand for Strand: 'The only thing I missed was that strand,' she noted, referring to the slut bang. 'I stand for that strand… #StandforStrand'

Top 5: The evening's show saw the Top Seven narrowed down to the Top Five, and Chayce was among those who made it through. Casey Bishop, Caleb Kennedy, Grace Kinstler, and Willie Spence rounded out the group, while Arthur Gunn and Hunter Metts went home

Top 5: The evening's show saw the Top Seven narrowed down to the Top Five, and Chayce was among those who made it through. Casey Bishop, Caleb Kennedy, Grace Kinstler, and Willie Spence rounded out the group, while Arthur Gunn and Hunter Metts went home

During a break, Coldplay played their new single Higher Power on a TV stage for the first time.

While the first half of Sunday's show explored the band's back catalog, the second half found the contestants dedicating a song to their moms on Mother's Day.

Chase's original, Mama, paid tribute to his mother's struggles raising him, moving the room.

New single: During a break, Coldplay played their new single Higher Power on a TV stage for the first time

New single: During a break, Coldplay played their new single Higher Power on a TV stage for the first time

Dedicated: While the first half of Sunday's show explored the band's back catalog, the second half found the contestants dedicating a song to their moms on Mother's Day

Dedicated: While the first half of Sunday's show explored the band's back catalog, the second half found the contestants dedicating a song to their moms on Mother's Day

Original: Chase's original, Mama, paid tribute to his mother's struggles raising him, moving the room.

Original: Chase's original, Mama, paid tribute to his mother's struggles raising him, moving the room.

'You make my heart happy, Chase,' his mother said, watching from her home.

'Listen, you had me crying on your song,' Lionel Richie, 71, told Chase. 'As a songwriter, I'm gonna tell you: Put that song out now. That's a smash record.'

'Sensitive, vulnerable, heavy machinery operator?' Katy lilted. 'Crying onstage, making his mother cry? A+, A+, A+!'

Crying: 'Listen, you had me crying on your song,' Lionel Richie, 71, told Chase. 'As a songwriter, I'm gonna tell you: Put that song out now. That's a smash record'

Crying: 'Listen, you had me crying on your song,' Lionel Richie, 71, told Chase. 'As a songwriter, I'm gonna tell you: Put that song out now. That's a smash record'

Katy speaks: 'Sensitive, vulnerable, heavy machinery operator?' Katy lilted. 'Crying onstage, making his mother cry? A+, A+, A+!'

Katy speaks: 'Sensitive, vulnerable, heavy machinery operator?' Katy lilted. 'Crying onstage, making his mother cry? A+, A+, A+!'

'What a way to pull out the right song on the right night!' added Luke Bryan, 44.

The night kicked off with a rendition of Coldplay's Paradise, sung by Casey Bishop, a 16-year-old high school student from Estero, Florida.

In rehearsals, she confessed to mentor Chris that she was nervous, and he said the song was about someone just like her, who wanted to do great things but was afraid.

Casey sings: The night kicked off with a rendition of Coldplay's Paradise, sung by Casey Bishop, a 16-year-old high school student from Estero, Florida

Casey sings: The night kicked off with a rendition of Coldplay's Paradise, sung by Casey Bishop, a 16-year-old high school student from Estero, Florida

Just like her: In rehearsals, she confessed to mentor Chris that she was nervous, and he said the song was about someone just like her, who wanted to do great things but was afraid

Just like her: In rehearsals, she confessed to mentor Chris that she was nervous, and he said the song was about someone just like her, who wanted to do great things but was afraid

'The main thing that helps me is just to exist within the song and don't worry about what anybody thinks,' he offered. 'Then your body just finds where it wants to go, and you're free.'

Hearing her sing, Chris said, 'Let's just stop it right there. I can't teach you anything.'

During the show, Casey really let loose and Katy praised her 'Chris Martin eccentric-ism.'

Exist: 'The main thing that helps me is just to exist within the song and don't worry about what anybody thinks,' he offered. 'Then your body just finds where it wants to go, and you're free'

Exist: 'The main thing that helps me is just to exist within the song and don't worry about what anybody thinks,' he offered. 'Then your body just finds where it wants to go, and you're free'

Can't teach: Hearing her sing, Chris said, 'Let's just stop it right there. I can't teach you anything

Can't teach: Hearing her sing, Chris said, 'Let's just stop it right there. I can't teach you anything

Let loose: During the show, Casey really let loose and Katy praised her 'Chris Martin eccentric-ism'

Let loose: During the show, Casey really let loose and Katy praised her 'Chris Martin eccentric-ism'

'It was so nice for you to harness that energy, and I hope when I get to see you sing again and again that you're just moving around like a little tornado,' she added.

For her mother, Casey did Alanis Morrisette's Ironic, and the judges praised her stage presence.

Willie Spence, a 21-year-old caretaker from Douglas, Georgia, sang a heartbreaking version of Coldplay's Yellow.

Energy: 'It was so nice for you to harness that energy, and I hope when I get to see you sing again and again that you're just moving around like a little tornado,' she added

Energy: 'It was so nice for you to harness that energy, and I hope when I get to see you sing again and again that you're just moving around like a little tornado,' she added

Stage presence: For her mother, Casey did Alanis Morrisette's Ironic, and the judges praised her stage presence

Stage presence: For her mother, Casey did Alanis Morrisette's Ironic, and the judges praised her stage presence

Willie sings: Willie Spence, a 21-year-old caretaker from Douglas, Georgia, sang a heartbreaking version of Coldplay's Yellow

Willie sings: Willie Spence, a 21-year-old caretaker from Douglas, Georgia, sang a heartbreaking version of Coldplay's Yellow

While practicing, he told Chris he'd grown up singing in church, and Chris said he'd done the same, showing a childhood photo of himself in 'a very strict English church.'

The frontman then jumped on the piano to play a stripped-down version of Yellow for Willie.

'Sometimes you're like, 'Oh my God, this is a human

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