Robbie Williams, Taylor Swift, Will.i.am, Jessie J, PSY, Union J, Olly Murs, The Wanted, Lawson and more! See the amazing high definition pictures of the Summertime Ball 2013's line-up.
Summertime Ball 2013
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Justin Timberlake - Your STB 2013 Host!
Summertime Ball 2013 Latest news
The 'Taking Over Me' stars also revealed how Robbie congratulated them on their Summertime Ball performance.
The 'Boyfriend' star tweeted the UK singer to wish him well after his return to performing at the Ball.
The '22' singer wowed in two distinct outfits during her time with Capital FM at the biggest pop event of the year.
The 'A Team' singer reveals all about his brief visit back in the UK to join Taylor on stage at the Ball.
The Summertime Ball 2013 star said at the event that both male superstars have been big influences on his career.