Def Jam records has released a statement on the behalf of Kanye West declaring that the version of "Mama's Boy" – also known as "Mama's Boyfriend" – that leaked to the internet earlier this week is "entirely bogus and unsanctioned."
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According to West, someone got hold of his a cappella track and added their own music, which closely approximated his signature sound from the College Dropout/Late Registration phase of his career. The statement insists that this violates West's creative intentions, and does not resemble the final version of the song.
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West is "deeply disappointed that one of the most personal, meaningful and special songs he has ever written would reach people in this way," and is taking measures to identify and prosecute those responsible for leaking and altering his music.