Out of the choices I would've guessed Selena's most likely. Though not sure who Robert Pattinson is, so I can't judge him. And I thought Justin Bieber was only really a singer, and didn't have any real acting background (I remember him making a guest appearance on True Jackson, but that hardly counts). But Selena Gomez seems to be one of those people who can maintain contracts with a lot of different companies. The main fallback might be that one of those companies is the Disney Channel, with whom I get the impression that Nickelodeon have some sort of rivalry with! I think she's probably most likely out of them though.

Most likely, Selena. I dislike selena, but im just basing this on common sense. Selena's popularity level is at its all time high, Her show on disney was probaly as popular as Icarly, I hear her on the radio all the time, and she is dating JB. So.. yeah.

Miranda already has a contract with nick!