Justin Bieber, One Direction & Taylor Swift Nominated For Radio Disney Music Awards

Pop superstars Justin Bieber, One Direction and Taylor Swift are among the nominees for the April 27 Radio Disney Music Awards (RDMAs), voting for which opens today.

R&B pop artist Mindless Behavior is confirmed as a performer at the Nokia Theatre L.A. show, joining onstage the likes of Selena Gomez, Cher Lloyd, Bridgit Mendler, Cody Simpson, Austin Mahone and Coco Jones.

There will be eleven categories to vote on. The RDMA's They're The One category for best music group will be a hotly contested one with One Direction, The Wanted, Mindless Behavior and R5 all facing off.

In the Bestest song of the year category, Taylor Swifts I Knew You Were Trouble is up against Justin Biebers Beauty And A Beat feat. Nicki Minaj, One Directions Live While We're Young and Cher Lloyds Want U Back. The RDMAs will also hand out awards for He's the one (best male artist), She's the one (best female artist) and ultimate breakout star (biggest viral artist).

Selena Gomez, Bridgit Mendler Performing at Radio Disney Music Awards

Die-hard supporters can have their voices heard in the So FANTastic category for the fiercest fans, pitting Beliebers against Mahomies, Selenators, Simpsonizers and Directioners. It promises to be a noisy night.Organizers are inviting fans to cast their votes via the RadioDisney.com, Facebook, Twitter or by texting RDMA to DISNEY (347639). Further information on the Awards, voting procedures and official rules can be found at www.RadioDisney.com/MusicAwards.

The Radio Disney Music Awards celebrate the most popular recording artists among kids and tweens. The awards show will be available across multiple platforms, inclu! ding Vevo, Disney Channel, Radio Disney, and the RadioDisney.com and Disney.com websites.

The first Radio Disney Music Awards TV spot will premiere on Disney Channel Friday (March 15) during a new episode of Gravity Falls.

Voting on the RDMAs will wrap-up on Monday, April 14.