I just had to try to play this on piano… so I thought I’d share it. I hope you enjoy my… late… piano version, played by ear 
The first time I heard this song, I really didn’t like it. I didn’t know Justin Bieber, either. My younger sister did though. But then… I ended up listening to it on repeat and got obsessed with it hehe ^^ ongaku4u.blogspot.com
Justin Bieber ft. Ludacris - Baby ~piano version~ from keudae