Lindsay Lohan did a little shopping in LA on Friday before packing her bikinis and heading to Vegas. She joined friends at the MGM Grand hotel on Saturday for a poolside birthday bash, which also served as a promotional event for her Sevin Nyne products. LL struck a few poses in a variety of swimsuits throughout the day. Samantha had to skip the party due to a DJing gig in Atlanta, but she did tweet Lindsay a "have fun." It seems like Lindsay did exactly that as she ate cake and spent the afternoon with pals.
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