Kristen Stewart, Rihanna: A day out in Hollywood

Here's what your favourite Hollywood stars have been up to.

Even as former beau Robert Pattison is being spotting driving around town with a mystery redhead, it's business as usual for Kristen Stewart.

Here, the Twilight star poses during a photocall before the Haute Couture Fall Winter 2013/2014 fashion show by German designer Karl Lagerfeld for French fashion house Chanel in Paris.

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Ever the fashion crusader, singing sensation Rihanna causes a stir with her cardigan-dress during a photocall before the Haute Couture Fall Winter 2013/2014 fashion show. 

John Lennon's widow Yoko Ono poses for a photograph while promoting her new book Acorn during a book signing in New York.