Naked Lady Gaga sketch to be auctioned

Singer Tony Bennett`s naked sketch of pop sensation Lady Gaga is being auctioned for charity.

The `Marry the Night` singer recently posed nude so the 55-year-old crooner could draw pictures of her after they recorded a song for his `Duets II` album, with the session captured by celebrity photographer Annie Leibovitz, and the drawing will now go be sold via internet auction site eBay, reported Contactmusic.

Other items to go under the hammer include the accessories Gaga wore for Annie`s photos, which appear in the current issue of Vanity Fair, including Mercura sunglasses, House of Lavande earrings, an Alexis Bittar ring and a pair of Brian Atwood shoes.