Bid on celeb-designed Havaianas flip flops! Clockwise from upper left: Naomi Campbell, Manish Arora, Sam Taylor Wood, Matthew Williamson, Basso & Brooke and Paul Smith. Photo courtesy of www.selfridges.co.uk

Yesterday, there was Beckham mania for the launch of the Emporio Armani Underwear Fall/Winter 09/10 campaign, but Selfridges London has also reached out to charities for its centennial celebration.

After setting up a Havaianas (Brazil's best export after supermodels) customization pop-up shop, the British retailer has invited celebrities and designers, such as Paul Smith, Alek Wek, Jade Jagger and Lulu Guiness to join in on the DIY fun by designing their own pair of flip flops.

Starting June 15 until midnight on June 26 (London time), you can bid on the fashionable one-of-a-kind footwear via a silent auction on Selfridges' website. All proceeds will go to CLIC Sargent, a charity that supports children with cancer.

With designs completely up to interpretation, the sandals range from the zany, such as Matthew Williamson's bejeweled barnacles fiasco, to the artsy, like Basso & Brooke's origami-inspired pair.

But if art is a reflection of its creator, then Naomi Campbell's design is right on point. The supermodel transformed the lowly flip flop into a killer stiletto. (Quite appropriate, since it appears worthy of causing a catwalk fall, and hey, may be better than a cell phone to throw at the hired help.)