SPEARSBLUEBRAUNEYES28_01.jpgBSPEARSBACKDR082807_01.jpgBritney Spears SPEARSBLUEBRAUNEYES28_14.jpgIt can be quite an experience to find yourself eyeball to eyeball with Britney Spears - especially when she forgets to put one of her contacts in (check out that top pic)! Yes, the pop princess accidentally left one of her lenses out before going shopping at Club Monaco, presumably for the more modest black garment she wore out of the store. Looks like filling up and feeding the meter weren't the only things to slip Britney's mind yesterday!

(And if you think you've seen the most eye-popping photos we snapped of Brit yesterday, you haven't clicked through the jump!)