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Justin Bieber's New Song 'All That Matters' Leaks: LISTEN HERE

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JUSTIN BIEBER
Justin Bieber performs at a closing concert in Singapore Monday, Sept. 23, 2013, a day after the Singapore Formula One Grand Prix. (AP Photo/Joseph Nair) | AP

Justin Bieber's new track "All That Matters" leaked online Sunday, hours before he was to officially unveil it as part of his new "Music Mondays" project.

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