Sorry Justin Bieber
Tulisa and Fazer go public, Rihanna causes mayhem in Northern Ireland and Gaga is 'Born This Wax' in this week's best pictures.
Rihanna performs during the Rock in Rio music festival in Rio de Janeiro. See more pictures of her performance alongside Katy Perry below.
Leona Lewis in Tokyo, Japan. Pic: Getty
One Direction are photographed at Heathrow Airport, London, wearing "thing" T-Shirts. Pic: Xposure
Pixie Lott celebrates her new Lipsy collection launch with VIP celebrity party at Public in London.
The singer this week tweeted fans to say that her new album 'Glassheart' will not be released until 2012, because she's having too much fun recording new material for it.
Nicole Scherzinger gets kissy with Steve Tyler. Find out why in the news story below.
Lady Gaga performs at a weekend gig. See more pictures of her performance in the photo gallery below.
Katy Perry performs at the Rock in Rio music festival in Rio de Janeiro, Brazil. See more pictures of her performance alongside Rihanna below.
Harry Styles from One Direction, of The X Factor fame, signs copies of the bands new book Dare To Dream at WH Smith's, Westfield, North London. See more pictures from the book signing below.
One Direction sign copies of their new book Dare To Dream at Westfield's WH Smith, North West London. See more pictures from the signing session below.
Rihanna is seen filming her new music video in Northern Ireland. Find out why Rihanna's navy are angry about the picture in the music news story below. Pic: Splash
Katy Perry and Rihanna having a Blast at a party in Brazil. Pic: Splash
It's been rumoured the pair have been dating for months, but only now have the pair been seen on a date together following a string of slushy tweets from Tulisa.
Pregnant Una Healy of The Saturdays wears leather on stage at the Guinness Store House for Arthur's Day 2011.
Rihanna arrives for filming of her new music video 'We Found Love' in the New Lodge area of north Belfast, Northern Ireland.
Enrique Iglesias performs during his Euphoria U.S. Tour at Prudential Center.
Rihanna shooting her new music video for her new song 'We Found Love' featuring Calvin Harris in a Belfast flat. See more pictures below. Pic: Barcroft Media
A new waxwork of Lady Gaga is unveiled in Tokyo, Japan.
JLS arriving at the BT Music awards, at the Roundhouse in Camden, where they scooped the award Best Group.
Ed Sheeran arriving at the BT Music awards, at the Roundhouse in Camden, north London.