Lady GaGa, Leona Lewis and Adam Ant turned out to honour Tony Bennett at the prestigious London Palladium on Monday night (03Oct11).
The singer turned 85 on 3 August (11) and to mark the milestone he staged a special concert in the U.K. capital.
Gaga, who collaborated with Bennett on his latest album Duets II, and Adam Ant were in the audience at the renowned venue, while Lewis took to the stage to sing with the veteran star.
In a post on her page after the show, the Bleeding Love hitmaker writes, "An unforgettable evening performing with the legendary Tony Bennett."