Billie Eilish leaves her biggest fan in tears by surprising her in emotional ...

Billie Eilish left her biggest fan in floods of tears by surprising her during an emotional Capital Radio interview on Thursday.

The Bad Guy hitmaker, 18, surprised young carer Marissa, 16, after she praised the singer for inspiring her while she juggles looking after both her mum and brother full time. 

In the touching interview, Billie snuck up behind Marissa while she spoke about why she she relates to the star, and broke down in tears when she turned around to see her proudly standing there.

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Sweet: Billie Eilish left her biggest fan in floods of tears by surprising her during an emotional Capital Radio interview on Thursday

Sweet: Billie Eilish left her biggest fan in floods of tears by surprising her during an emotional Capital Radio interview on Thursday

In a clip of the surprise, Roman Kemp explained that Marissa was invited onto Capital Radio after her mum Jacqueline got in touch.

She explained Marissa has cared for her since she was diagnosed with type 2 diabetes and an amputation left her wheelchair bound.

She also revealed that her son requires full time care as he has severe learning difficulties, and Marissa has looked after them both full time since she was 14.

Stunned: The singer surprised Marissa, 16, after she praised the singer for inspiring her while she juggles life as a young carer

Stunned: The singer surprised Marissa, 16, after she praised the singer for inspiring her while she juggles life as a young carer

Secret plan: In a video of the sweet moment, Capital FM presenter Roman Kemp explained that Marissa's mum Jacqueline got in touch with the show to see if they could surprise her

Secret plan: In a video of the sweet moment, Capital FM presenter Roman Kemp explained that Marissa's mum Jacqueline got in touch with the show to see if they could surprise her

Sweet: She explained that Marissa takes care of her and her brother full time, after she was left wheelchair bound two years ago by an amputation

Sweet: She explained that Marissa takes care of her and her brother full time, after she was left wheelchair bound two years ago by an amputation

Important: During the interview, Marissa told Roman that she looks after her mum - who has type 2 diabetes - and her brother who has severe learning difficulties

Important: During the interview, Marissa told Roman that she looks after her mum - who has type 2 diabetes - and her brother who has severe learning difficulties

During the interview, Marissa spoke about the day-to-day struggles of caring for her family, but unbeknownst to her Billie was listening backstage.

She explained: 'Balancing out home life as a young carer, school life with GCSEs, social life, with my friends who aren't going through the same thing as I am, they're really understanding...

'I have lovely friends but they don't understand they're not young carers so the're not in my position they can't relate to me but they can always be there to support me if I'm down but they're never gonna know what it's gonna be like in my shoes.'

Secret: Unbeknownst to her, Billie was listening to the entire interview backstage, and was getting ready to surprise her

Secret: Unbeknownst to her, Billie was listening to the entire interview backstage, and was getting ready to surprise her

Amazing: Roman asked Marissa about how she copes with juggling her education and social life with being a young carer

Amazing: Roman asked Marissa about how she copes with juggling her education and social life with being a young carer

Emotional: The teen admitted that life as a young carer was a challenging as she friends didn't always understand her plight, but admitted she found solace in Billie's music

Emotional: The teen admitted that life as a young carer was a challenging as she friends didn't always understand her plight, but admitted she found solace in Billie's music

Sneaky: As the interview continued, Billie sneaked into the studio and stood right behind Marissa ready to surprise her

Sneaky: As the interview continued, Billie sneaked into the studio and stood right behind Marissa ready to surprise her

Marissa then Roman that Billie was one of her favourite singers, because she found her music to be a great comfort during the daily struggles of being a young carer.

She said: 'She's just really inspiring her music is the type of thing, whenever you're down and depressed and you've had a long day just go to my room and lie down my bed, blast up the volume and - I don't care if I go deaf - and just listen to her.

'I've seen her interviews, and I know she's had a tough life going into fame, we're very

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