Taylor Swift Robbie Williams Justin Timberlake will.i.am Olly Murs Jessie J The Wanted Labrinth The Saturdays Ellie Goulding Lawson Rizzle Kicks Union J Disclosure AlunaGeorge Robin Thicke Naughty Boy Rudimental Duke Dumont James Arthur Psy Eliza Doolittle Sam Smith Ella Henderson B.o.B A*M*E Ella Eyre John Newman Ed Sheeran Marvin Humes