Gentleman GaGa was all about the boobs at Belvedere Vodka & V Magazine’s after party for Marc Jacobs last night, following his Fashion Week show. She gave an acoustic performance of Poker Face and Just Dance in a sheer, boobie-showing red lace dress (NSFW image in the jump).

Lady Bunny spun for three hours and attendees included Janet Jackson, Russell Simmons, Ciara, Estelle, Toni Braxton, Courtney Love, Lindsay Lohan and Alek Wek.

NY Post reports the party was a snooze, and Lady GaGa sucked balls (not testes, just her voice).

Marc Jacobs’ after-party was as disappointing as his show: Lady Gaga’s acoustic piano set proved that her voice is best remixed by club deejays, and Lindsay Lohan finally made showed, but spent the night in a hotel penthouse suite above the fray. Jacobs, in white shirt and black skirt, puffed away despite telling Buzz he quit months ago. Jared Leto agreed to sign guitar covers the dudes from stupidfamouspeople.com had schlepped over. Janet Jackson did not.

More images in the jump!

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