Lady GaGa & Elton John Save The Planet

Lady GaGa and her new best mate Elton John  are to follow up their Grammy Awards collaboration by teaming up with Sting at an upcoming Rainforest Fund benefit.

The trio and Dame Shirley Bassey will perform together at Carnegie Hall in New York on 13 May.

The event will mark the 21st birthday of the charitable organisation, which Sting and his producer/actress wife Trudie Styler founded. Styler tells Billboard.com, she's responsible for persuading Lady GaGa to perform: "She's such a great young woman. It's a winning combination - we're going to have a riotous time up there.

"Sting, Elton and GaGa will play together, and the boys will be performing with Dame Shirley, doing a great rendition of Hey Big Spender."