Entertainment’s brightest young stars among kids and tweens are scheduled to present at the (RDMAs), a celebration of music’s most popular young artists on Saturday, April 27 at Nokia Theatre L.A. LIVE. Selena Gomez, Bridgit Mendler (“Good Luck Charlie”), Denise Richards (“Twisted”), R&B artist Jason Derulo, Jessica Sanchez (“American Idol”), NASCAR Daytona 500 Champion Trevor Bayne, Zendaya (“Shake It Up,” “Dancing with the Stars”) and Bella Thorne (“Shake It Up”) are among the presenters, and Justin Bieber, Demi Lovato and Ryan Seacrest will make special appearances.