Bennett saw Gaga naked

Veteran crooner Tony Bennett was left aghast after walking in on Lady Gaga's naked photoshoot during the recording of their duet.

The pair teamed up to record a version of The Lady Is A Tramp for Bennett's new Duets II album, and during the process Gaga took time out to shoot a Vanity Fair spread at the studio with famed photographer Annie Leibovitz

Leibovitz asked the star to strip off and Bennett was left red-faced when he accidentally walked in on the shoot.

Gaga tells British TV host Jonathan Ross, "I just shot a spread for Vanity Fair in America and Annie Leibovitz shot me and she wanted me to be naked of course... I was in Tony's studio and I walked in and she was like: 'I want you to be naked,' so I took my robe off and lay down and poor Tony was standing there looking at me like: 'Oh this f**king girl'."