MTV Video Music Awards 2014

The Names You Need to Know at This Year's VMAs

Have no fear if you don't know your Iggy from your Avicii! Study up on 5 Seconds of Summer, Ariana Grande, Sam Smith and more stars vying for Moonmen

SIA

The Australian songstress found mainstream success with David Guetta's club hit "Titanium" in 2011 and writes for legions of pop stars. Still, Sia – who's up for video of the year, best video with a social message and best choreography – seems more comfortable in the studio than under the spotlight, performing her hit "Chandelier" on The Ellen DeGeneres Show with her back turned to the audience.