Rihanna, Justin Bieber, U2 and Bon Jovi are joining forces for Japan

“Japan needs our help…we all need to step up,” Justin Bieber wrote Monday on his Twitter page regarding his participation in the charitable project.

Rihanna and Nicki Minaj also offer their songs for the album which will be available only in digital form by Saturday across the world.

“We are doing it only digitally because it is faster,” said a Universal spokesman, adding that the record would be “a worldwide release”.

Proceeds raised from the sales of the album will be delivered entirely to the Japanese Red Cross. The full list of artists who find themselves on the compilation album will be revealed in the coming days. Lady Gaga, who is a part of the Universal Music team, could also take part in the project.

On the day of the earthquake and tsunami, the interpreter of “Born This Way” launched on her web site the selling of a bracelet with the inscription “We pray for Japan” to raise funds for victims of the natural disasters.

The earthquake and tsunami that took place on March 11 have already more than 21,000 dead or missing in this country of East Asia.