Kate Moss is clearly not happy with just being one of the most famous supermodels in the world – she’s desperate to be a rock star too! She’s already sung with ex-boyfriend Pete Doherty and on a Primal Scream track, but that’s not enough rock 'n' roll action for the model. At a charity event last night – the very same one Sienna and Patrick left together – Kate took the opportunity to sing a version of Summertime with Pink Floyd legend David Gilmour on guitar, and ended up writhing about on the floor during her performance. We’re a bit embarrassed just looking at these pictures, so it’s no wonder her current boyfriend Jamie Hince hasn’t let his famous girlfriend perform with his band The Kills.