Cyrus joins previously announced performers Katy Perry and The Killers, with the evening's MC Redfoo of LMFAO, backstage host Ariana Grande and presenter Ron Burgundy of "Anchorman 2" (a.k.a. Will Ferrell) also set to appear.
Justin Timberlake and Macklemore & Ryan Lewis lead the noms with five nods each, while Cyrus, Lady Gaga, Justin Bieber and Robin Thicke are each up for four awards. Taylor Swift, Bruno Mars, Green Day, Thirty Seconds to Mars, Daft Punk, Rudimental, Icona Pop and One Direction are each nominated for three awards. Artists with two nods include Rihanna, Katy Perry, Eminem, Jay Z, Bastille, Imagine Dragons, The Killers, Paramore, Rita Ora, Drake, Afrojack, Avicii, Calvin Harris and Iggy Azalea.
Fans vote by visiting http://www.mtvema.com online or http://m.mtvema.com on their cell phones. Voting is open until 11:59 P.M. CET on Nov. 8.
The show will air across MTV's global network of more than 60 channels reaching nearly 700 million households, as well as through syndication. Bruce Gillmer and Richard Godfrey are exec producers.