Lady Gagas Applause New Single

Lady Gaga unveils the artwork for her new single "Applause," Katy Perry meets Britney Spears at the premiere of 'Smurfs 2,' and Rihanna wraps up the European leg of her Diamonds World Tour in Helsinki.

• 2013-07-30T18:07:11+00:00
• Duration: 02:23

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