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See Rihanna's perfume launch, Beyonce's new fashion line and J-Lo's Idol lunch date...
Rihanna launches her new perfume 'Reb'l Fleur' in the UK, ahead of her performance at V Festival.
Beyonce Knowles promotes her clothing line House of Dereon, which launches in the UK for the first time next month.
Bruno Mars performs live on stage at the Hammersmith Apollo.
Nicole Scherzinger, pictured in New York, hinted that Mariah Carey could appear as a guest judge on the US X Factor.
Jennifer Lopez was confirmed for another series of American Idol and joined her Idol mates for a celebratory lunch.
Lady Gaga visits MTV's Times Square studio to announce she'll be the headline act at this year's VMAs.
Usher, pictured outside his New York hotel, is rumoured to be collaborating with Cheryl Cole.
Tulisa Contostavlos poses with fans as she arrives for The X Factor official launch bash.
Kelly Rowland joins Tulisa at The X Factor event in London.
Enrique Iglesias puckers up to yet another fan on stage for NBC's 'Today' show.
Will.i.am announced the new date for the Concert 4 NYC which the Black Eyed Peas will perform at this September.
Lady Gaga released the video for her brand new single 'You And I' this week.
Taio Cruz performs on ABC's Good Morning America at Rumsey Playfield, Central Park.
Redfoo and SkyBlu of LMFAO perform at the MLB Fan Cave.
50 cent performs live for screaming fans at the Palais Club in Cannes.