Sing us a song, you're the piano man / Sing us a song tonight / Well, we're all in the mood for a melody / And you've got us Beliebing all right. 

Justin Bieber, the Billy Joel of his generation, spent some downtime at a piano Monday, where he performed instrumental covers of Drake's "Hotline Bling" and Rihanna and Drake's "Work." And you can tell he's really feelingthe music. 

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This isn't the first time Bieber has covered "Hotline Bling" -- but this time, he's more likely to have moms everywhere saying, "Well, maybe that Justin Bieber is a nice boy after all."

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Bonus: "Hotline Bing" is the Drake and Friendsmashup you SO need.

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