The Lady is a vamp! Gaga dazzles in gold sequinned gown as she hits the stage with Tony Bennett ahead of jazz album release

She used to wowing the crowds with her wacky costumes and eccentric dance routines, but Lady Gaga proved she can do old fashioned glamour with the best of them on Monday night.

The Bad Romance hitmaker hit the stage at the Grand'place with legendary crooner Tony Bennett in Belgium for a special concert just hours before the release of their collaborative jazz album, Cheek To Cheek.

Stepping out on stage at the same time as the 88-year-old, Gaga sparkled in a gold sequinned halter-neck gown with a matching headpiece.

Ga-ga-gold: Lady Gaga looked stunning in a halterneck sequinned number as she took to the stage in

Brussels on Monday night

She made the most of her stunning outfit, throwing around her the tail of her dress as the pair performed a series of tracks from the record, including classic standards Anything Goes, Nature Boy and Let’s Face the Music and Dance.

At a press conference in Brussels, earlier in the day, Gaga explained how she'd always loved and performed jazz, but made her music and sets outlandish in a bid to grab the world's attention.