She?s no stranger to crazy on-stage antics and Lady GaGa made a guest appearance at the Semi Precious Weapons concert in London last night (December 15).
The ?Bad Romance? singer was spotted leaving the O2 Academy in Islington, hiding behind a pair of black sunglasses as she tried to avoid being photographed.
Earlier in the night, Gaga hopped behind the drums during the Weapons? set and rocked out to the delight of the audience.
Singer Justin Tranter told the crowd, "We were so broke that we couldn't afford the f---ing subway, but what could we afford? We could afford two things: We could afford to be beautiful and we could afford rock and roll. On drums we have two of my oldest friends in the world, Daniel f---ing Crean and my sister, my soulmate, Lady f---ing Gaga!"