Jessie J was beaming as she left the Oslo nightclub in London's Hackney after playing an intimate gig for her fans on her birthday. She wore an all black outfit with her hair in tight curls.
Lady Gaga paid tribute to her father, Joe Germanotta, by wearing a black t-shirt emblazoned with an image of his face as she arrived at the Roseland Ballroom in New York City.
Taylor Swift was spotted singing along to the music on her iPhone in New York City as she enjoyed a shopping trip in dark red trousers and a caramel coloured coat.
Katie Holmes kept it casual in a pair of light blue jeans and a navy pea coat as she went for a stroll in New York City. The actress also wore a pair of high top trainers and carried a camouflage print tote bag.
Rihanna was spotted heading into Mayfair's Tramp nightclub for the second night in a row. The 'Rude Boy' singer wore a red hair piece and leather jacket as she partied at the London hotspot until 4am.
Kim Kardashian teamed a grey tee and jeans with a leather jacket as she left her New York apartment. The 'Keeping Up With The Kardashians' star headed out for a lunch at Cipriani restaurant in SoHo.
Jessica Biel wore a grey oversized blazer and jeans as she headed to LAX airport with her luggage. The actress stayed close to her husband Justin Timberlake as the the pair boarded a flight out of Los Angeles.