AceShowbiz -

MTV is back with its annual digital music celebration, O Music Awards, for a second time. This time around, Katy Perry, Justin Bieber, Demi Lovato and Lady GaGa are among lucky musicians who lead nomination list with two nods each.

Perry is listed in two new categories, Best Lyric Video and Best Artist with a Cameraphone. She is battling Joe Jonas, Lenny Kravitz, Christina Perri, and D.Willz for the former prize. In the latter category, she faces off a bunch of artists including two teen pop singers Bieber and Lovato.

Beside going head to head in the Best Artist with a Cameraphone, Bieber and Lovato also bump into each other in their second nomination. Their devotees, "Beliebers" and "Lovatics", pit them against each other in Fan Army FTW. They are joined by the likes of Tokio Hotel, Adam Lambert, Taylor Swift, Nicki Minaj, Lil Wayne and GaGa.

In addition to competing for best fan, the Mother Monster also has a chance to be named Must Follow Artist on Twitter. To win the coveted gong, the outlandish singer has to beat fellow celebs like Mark Hoppus, Snoop Dogg, Blake Shelton and Cher.

Winners for the second O Music Awards will be announced on October 31 in a star-studded ceremony. Voting has begun since Tuesday, September 27 on its official site. The other artists who are listed among the nominees include Britney Spears, Gwyneth Paltrow and Foo Fighters.

Fan Army FTW:

• Tokio Hotel - "Aliens"
• Lady GaGa - "Little Monsters"
• Adam Lambert - "Glamberts"
• Justin Bieber - "Beliebers"
• Insane Clown Posse - "Juggalos"
• Iron Maiden - "Troopers"
• Demi Lovato - "Lovatics"
• Taylor Swift - "Taylor Nation"
• Nicki Minaj - "Barbiez"
• Lil Wayne - "Team Weezy"

• Lady GaGa
• Mark Hoppus
• Snoop Dogg
• Blake Shelton
• Cher

• THe PETEBOX covers "Where Is My Mind" by The Pixies
• Anna Burden covers "You're Gonna Miss Me" by Lulu and the Lampshades
• Air National Guard Band covers "Rolling in the Deep" by Adele
• Tyler Ward covers "Super Bass" by Nicki Minaj
• Maddi Jane covers "Price Tag" by Jessie J

• Metallica - "Enter Sandman" at Monsters of Rock Festival
• Sinead O'Connor and Bob Marley - "War" on "Saturday Night Live"
• Nirvana - "Smells Like Teen Spirit" at Top of the Pops
• Dolly Parton - "Jolene" at That Good Ole Nashville Music
• Notorious B.I.G. Freestyling in Brooklyn, NY

• Bjork
• Chris Milk
• Wayne Coyne
• Girl Talk
• Devo

• Katy Perry - "E.T." ft. Kanye West
• Joe Jonas - "See No More"
• Lenny Kravitz - "Stand"
• Christina Perri - "Arms"
• D.Willz - "Watermelon"

• The Weeknd
• MNDR
• Kina Grannis
• Ben Lovett
• Odd Future Wolf Gang Kill Them All

• Foo Fighters - "Hot Buns"
• Big Freedia - "Ya'll Get Back Now"
• Mr. Ghetto - "Walmart"
• The Weeknd - "Wicked Games"
• Marilyn Manson - "Born Villain"
• Warm Ghost - "Open the Wormhole in Your Heart"
• Scissor Sisters - "Invisible Light"
• The Shivers - "Two Solitudes"
• Jane's Addiction - "End to the Lies"
• The Floacist - "Let Me"

• Gwyneth Paltrow
• Health
• Best Coast
• Britney Spears
• Tyler, The Creator

• James Blunt
• Sinead O'Connor
• The Game
• Courtney Love
• T-Pain

• iTunes Festival 2011
• Lollapalooza
• Pitchfork
• Way Out West
• Coachella

• Demi Lovato
• Justin Bieber
• The Deftones
• Portugal. The Man
• Young the Giant
• Shiny Toy Guns
• The National
• Katy Perry
• Amanda Palmer
• Ben Folds