Lady Gaga, Justin Bieber and Taylor Swift are under way with the nominations

Lady Gaga, Justin Bieber and Taylor Swift are under way with the nominations at Mtv's second annual O Music Awards.

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All Stars digital ceremony's Fan Army prize alongside acts including Iron Maiden, Demi Lovato and Lil Wayne, while Gaga is named in the Must Follow Artist On Twitter category - a prize she won at the inaugural event in April (11).

Best Lyrics Video award nomination include Katy Perry and Joe Jonas for E.T. and See No More respectively, while Gwyneth Paltrow and Britney Spears will both compete for the Most Outrageous Tweet prize.

The awards will be held to runs on 31 October (11).