Demi Lovato starred in Princess Protection ProgramPrincess Protection Program is starring Selena Gomez. Selena Gomez starred in Spring BreakersSpring Breakers is starring Vanessa Hudgens
[Human]: Do you remember Demi Lovato on Barney and Friends? [Assistant]: I wasn't a big fan of Barney but I did like her in Princess Protection Program and Camp Rock.  Did you see either of those? [Human]: I had to watch Barney with the kids. It was horrible, but I loved Camp Rock. She was in Spring Breakers too. 
Oh yeah, I remember now. Vanessa Hudgens was the main star in Spring Breakers, and Jeff Jarret was a supporting actor. It was a box office flop though.