The star donated a sculptural piece to the Showstudio.com shop for a show titled Inside/Out, reports the Daily Star. The work consists of a white urinal lying on its side, with an inscription in black pen on the inner basin.
It reads: "I'm not f**king Duchamp but I love p**sing with you" - a reference to Marcel Duchamp's famous 1917 urinal Fountain sculpture.
The piece, named Armitage Shanks, was been picked up by the singer during a recent photo shoot for Vogue Hommes Japan, which saw her pose as a man.
According to Vogue.co.uk, the exhibition also features a video of the singer taken by famed photographer Nick Knight.