RobertocavalliVictoria Beckham might have made Oxfam a little more fashionable back in November, but I think it's safe to say that it's not her main shopping haunt! Good ol' Posh recently took to the red carpet in this show-stopping, backless number by Roberto Cavalli, and I'm pretty sure it wasn't a charity shop find! If you're in love - and happen to be independently wealthy or married to a footballer - you can pick it up for a jaw-dropping £5,545 at Net-A-Porter - which is probably enough to completely buy out several Oxfams!

Victoria Beckham is not happy | Victoria Beckham launches style website | Posh and Katie Holmes take over Paris