BSPEARSSATURDAY0908_02.jpgBSPEARSSATURDAY0908_10.jpgBritney Spears BSPEARSSATURDAY0908_12.jpgLook at that shiny, shimmering dress! Britney continued her Vegas weekend by going out again Saturday night with cousin Alli. The two partied at Treasure Island and Brit didn't get back to her room until very late - around 4 a.m. And check this out: Word on the street is Criss Angel was somewhere else with another girl during that time... uh-oh! We hope any possible drama won't affect tonight's performance!