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Last night, Britney headed to Ruth's Chris Steakhouse in Beverly Hills. She was there with her usual companion, her cousin Alli. She arrived for a 9:30 reservation and left by 10:15! -- Talk about dine and dash!

She looked cute in a white top (but no bra?!) and dark velvet shorts with boots, but she appeared to have spilled something (steak sauce?) on her top and had attempted to clean it off with water. Her baby blues were intact and wig in place. Brit looked happy enough, but didn't feel like talking.

BTW, it was her sister's birthday party last night but Brit chose steak over dad. We hear Britney sent a gift by courier -- how sweet ...

more pix coming later ...