Lady Gaga exposes her rear in sheer jumpsuit at concert with Yoko Ono

'Poker Face' singer Lady Gaga exposed her rear for the crowd to see when she took to the stage with Yoko Ono's 'We Are Plastic Ono Band'.

Gaga, 24, was dressed in an outrageous bedazzled one-piece jumpsuit, which had only sheer panels of fabric and a smattering of crystals covering her rear.

The singer towered over Ono, 77, as she sported a pair of lace-up black boots with sky-high heels and a black headband embezzled with spikes.

"We Are Plastic Ono. I got to sit in as a guest musician tonight, what a legendary band+mother, Yoko," the New York Daily News quoted Gaga as tweeting to her fans.

The concert at the Orpheum Theatre in Los Angeles kicked off what will be a week of events in honour of Ono's legendary late husband, John Lennon, whose birthday is October 9.