See Justin Bieber Transform from 'Baby' Boy to Mustached Man

Remember when the world first caught Bieber fever? Some Canadian 14-year-old named Justin Bieber, with an angelic voice and a full head of hair — which would soon be styled in his famous swoopy 'do — entered the scene in 2007, after his YouTube videos went viral.

Millions of records sales; a high-profile romance with Selena Gomez; legal troubles (thanks to egg pranks and car races); a lot of tattoos; and some wacky outfits later, Bieber is still doing his thing. Although, now he's usually shirtless and wearing facial hair.

Related: The Evolution of Justin Bieber's Mustache

As the crooner turns 21 on March 1, check out this GIF that shows Bieber's transformation from cutie-pie teen to swaggy, car-lovin' grown man, in seconds.

(Getty Images)
(Getty Images)

They grow up so fast.

Related: Justin Bieber Checks in With His Therapist, Ellen