Lori Loughlin's daughters Olivia Jade and Bella party at $3M home ...

Her parents may be facing up to 40 years in prison and millions of dollars in tax penalties, but that did not stop Olivia Jade from partying with friends on Thursday night.

The daughter of Full House actress Lori Loughlin and designer Mossimo Giannulli was seen enjoying some laughs and a little bit of dancing with a tight-knit group of YouTube stars who refer to themselves as The Vlog Squad.

DailyMail.com found multiple videos of the Olivia Jade, 19, and another girl who looked similar to her big sister Isabella Rose, 20, social media.

In one video, the pair let loose to the track Rock Star, which was released by the singer back in her Hannah Montana days.

Olivia proved to be the more animated member of the faux-crew crew at first as she started dancing alone to the tune while Bella showed an initial reluctance to shimmy with her friends. 

TMZ was the first to spot Olivia at the party, which was hosted by 22-year-old YouTube star David Dobrik at the $3 million Studio City mansion he calls home.

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Jaded: Olivia Jade (circle above with a young woman who looked similar to his sister Isabella dressed in all black with white sneakers behind her)was seen partying at a Hollywood Hills house party in multiple videos posted to social media on Thursday

Jaded: Olivia Jade (circle above with a young woman who looked similar to his sister Isabella dressed in all black with white sneakers behind her)was seen partying at a Hills house party in multiple videos posted to social media on Thursday

Full house: She was one of the guests at the $3 million Hollywood Hills home of YouTube star David Dobrik, and a young woman who looked like her sister was also there (Olivia circled on Thursday)

Full house: She was one of the guests at the $3 million Hills home of YouTube star David Dobrik, and a young woman who looked like her sister was also there (Olivia circled on Thursday)

This night out for the girls comes two days after multiple sources tell DailyMail.com that one of the actress’ daughters received a target letter from federal prosecutors in Massachusetts earlier this month regarding the Operation Varsity Blues investigation. 

That letter informed the embattled University of Southern California student that she was the subject of an investigation which could result in criminal charges.

No students have been charged or arrested at this point in the investigation, but court documents make it clear that some of the youngsters were aware of the illegal actions being  carried out in their behalf.

'It is a not-so-veiled threat,' said one source who has seen the letter. 

'[The US Attorney's Office for the District of Massachusetts] is making it pretty clear that they have evidence that very strongly suggests she knew of the illegal plot.'

The sources DailyMail.com spoke with only knew about one of the daughters getting a letter, the tone of which was described as 'ominous.' 

That letter failed to bring Loughlin and her husband Mossimo Giannulli to the bargaining table however, with the pair entering a not guilty plea on Monday to  charges of mail fraud and money laundering. 

A lawyer for Loughlin did not respond to a request for comment, and it is not clear if her daughter has sought separate counsel. 

A spokesperson for the US Attorney's office declined comment. 

Shortly after their not guilty plea, their older daughter Isabella deactivated her Instagram account. 

One of the sources said that target letters have been going out for the past month as prosecutors work to obtain evidence in the case and pursue additional charges and defendants. 

These latest target letters seem be less concerned with gathering information in the case said that source, who described the notes as 'warning shots' to the students. 

'It is clear that some students are going to be charged,' said the first source.

That individual then added that they know five people who have received letters similar to Loughlin's daughter, noting that in all five cases the parent/s refused a plea deal and later filed a plea of

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