Alessandra Ambrosio: Marquee Dayclub Hostess Hotness

Spending the weekend tending to hosting duties, Alessandra Ambrosio was front and center at the grand opening of Marquee Dayclub at the Cosmopolitan Las Vegas on Saturday night (April 9).After chowing down at Tao Las Vegas, the Brazilian beauty joined up with expecting actress Selma Blair to welcome partygoers to the newly launched Sin City hotspot.

Tweeting about the fun-filled festivities to her many followers, Miss Ambrosio happily wrote, "And.... It's party time!!!"The party came just as Alessandra was also readying to celebrate a special occasion - as the Victoria's Secret beauty turns the big 3-0 on Monday, April 11th.

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