GaGa posed nude for Bennett to paint her portrait after recording The Lady is a Tramp with him for his Duets II album.
Items for auction include the original, signed portrait by Bennett, as well as the pricey accessories GaGa wore during the additional photo shoot with Leibovitz, like an Alexis Bittar ring and some Brian Atwood heels.
The online auction at ebay.com/celebrity will go to benefit Exploring the Arts and the Born This Way Foundation.
Check out after the jump for the complete list of items up for auction.
Limited edition print of Lady Gaga’s Vanity Fair Cover Photo, signed by Annie Leibovitz
Limited edition print of Tony Bennett’s “Gondola, Venice”
Alexis Bitter cocktail ring worn by Lady Gaga
Daler-Rowney Paint Brush Set signed by Tony Bennett
Mercura Sunglasses worn by Lady Gaga
Autographed copy of “Tony Bennett in the Studio: A Life in Art and Music”
House of Lavande crystal earrings worn by Lady Gaga
Copy of “Lady Gaga x Terry Richardson”, with limited edition poster signed by Lady Gaga and Terry Richardson
Brian Atwood heels worn by Lady Gaga
Limited edition poster of Vanity Fair cover, signed by Lady Gaga