Who? Alexandra Burke, Kylie Minogue and Pixie Lott AKA the Rihanna fan club.
What? It seems that Alex, Kylie and Pixie could be Rihanna's biggest fans. They were all spotted leaving her secret gig at the HMV Forum in Kentish Town last night.
Alexandra (who we barely recognised!) teamed her newly-blonde (ginger) hair with a bold red lip while wearing a knitted grey pencil skirt, a black lace bodice and hooded leather jacket. Think, sexy secretary meets biker chick... does that work?
Kylie, who clearly has access to some kind of Doctor Who tardis, managed to make an appearance between liaising with the Queen and taking to the stage at the Royal Variety Performance.
Pixie Lott, on the other hand, was channelling her inner dock worker when she rocked up in a pair of denim dungarees and what looked like a red tool box...
We're not too sure on Alex's hair colour, but we've got some serious curly hair envy. So just to make us even more green here's a gallery to celebrate those wavy-haired celebs: