Jessica Alba showed her wild side at club h.wood in Los Angeles Monday night, just hours before celebrating her 28th birthday.

Partying with husband Cash Warren, Jessica was drinking champagne. Eyewitnesses told RadarOnline.com that she was tossing back more than several glasses and then she began to dance sexily in front of her table.

To the delight of almost everyone (especially RadarOnline.com) she ripped off her sweater and threw it at friends she was celebrating with. Underneath the sweater? Just something that looked like a corset!

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