Happy birthday, Justin Bieber! Can you believe the singer is 19 years old?!
We've watched the superstar grow up in the public eye since he first burst on the scene as a young teen, and he continues to be one of the biggest and most buzzed-about names in the music biz.
Last night, Justin kicked off his birthday celebration by showing off his buff bod on the streets of London, and he took to Twitter today to thank fans for the B-day wishes:
So, because we can't help but notice the star is looking much bulkier than before, we've decided to share a bevy of Justin's shirtless shots, as we know the singer loves to strip down.
You're looking abs-olutely fabulous on your birthday, Biebs!
Baby, baby, baby—oh!—Justin just gets better with age.