Lady Gaga & Tokio Hotel Made a cover Together OR is just a lie for April Fool's Day?!?

Lady GaGa and TH made a cover together for the Queen's song "We want to break free" For a Japan charity
http://www.promipranger.de/52614-lady-gaga-tokio-hotel-we-want-to-break-free-gemeinsames-queen-cover-fuer-japan-charity
hmm