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Boy, those Simpson sisters really do stick together!

Jessica showed up in Lake Tahoe this weekend to support boyfriend Tony Romo (seen here pickin' up some beer!) in the American Century Celebrity Golf Championship - fellow celeb couple Kate Hudson and Lance Armstrong arrived earlier this week.

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But that's not all - a preggers Ashlee Simpson and hubby Pete Wentz came as well! Hmm, what look is Ash sporting now? Maybe she's just dressing like Pete!

Stay tuned for video...