Rihanna, Bon Jovi and Nicki Minaj also confirmed.
The world's biggest record labels available by the end of the week is aimed at making an album, though artists lineup yet to be fully finalized. Proceeds will be Japan's Red Cross, a spokesman for the group said on Monday.
He added, "We are doing it only digitally because it is faster, and this will be a worldwide release. The plan is to have it available later this week".
Lady Gaga, part of Universal's stable, used to contribute to the album one of the stars, and Japan already for victims of recent natural disasters by selling a special wristband money can be raised.