Justin Bieber, Amy Poehler, Jonah Hill, Carrie Underwood, Patton Oswalt, and more share music that mattered most when they were kids
''I would put Boyz II Men on in my room and try to do the little runs that they do. Just stupid stuff. Vocal acrobatics that they did. I would put it on repeat. Repeat. Oh, I didn't get it. Do it again. I just kept trying, and I finally got it.''
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