Proceeds from the album are being donated to the Japanese Red Cross Society, which is providing relief to those affected by March's devastating earthquake and tsunami in Japan.
More than 500,000 digital and physical copies of "Songs For Japan" have been sold.
The album includes tracks by John Lennon, U2, Bob Dylan, Red Hot Chili Peppers, Lady Gaga, Beyonce, Bruno Mars, Katy Perry, Rihanna, Justin Timberlake, Madonna, David Guetta, Eminem, Bruce Springsteen,
Josh Groban, Keith Urban, Black Eyed Peas, Pink, Cee Lo Green, Lady Antebellum, Bon Jovi, Foo Fighters, R.E.M., Nicki Minaj, Sade, Michael Buble, Justin Bieber, Adele, Enya, Elton John, John Mayer, Queen, Kings Of Leon, Sting, Leona Lewis, Ne-Yo, Shakira and Norah Jones.
The participating songwriters, record labels, music publishers and iTunes have waived their royalties and proceeds to ensure that the JRCS receives as much support as possible from this initiative, Legacy said in a news release Wednesday.