Lindsay Lohan may have given up booze and drugs, but she doesn't seem to be giving up her friends! The rehabbin' redhead spent yesterday afternoon palling around with old chum Samantha Ronson as the two split their time between shopping at Tabloid and Urban Outfitters and lunching at Porta Via in Westwood. We'll admit to being a little nervous to see Lindsay hanging out with Samantha again - after all, they certainly have a checkered history together - but judging by the cheery attitude Lindsay was displaying, we're willing to give 'em the benefit of the doubt!