The singer enjoyed an evening out at The...
Gaga's appearance was kept secret until shortly before the show when it was announced on the venue's Twitter.com page.
The Poker Face hitmaker turned heads by arriving wearing little more than fishnet nights and a hairy waistcoat to cover her modesty.
The performance marks Gaga's first public outing since the death of her grandfather last week (22Sep10) and his funeral on Monday (27Sep10).
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