Happy Birthday, Biebs! Watch Justin Bieber Grow Up in Photos

This little boy from Canada, seen blowing bubbles, probably would never have guessed that he would grow up to be one of the biggest stars in music history.

The singer kept it casual in a patterned hoodie while signing autographs for fans.

Before they got married, Justin and Hailey were just two kids growing up in the entertainment industry.

The Biebs added a gold chain and Yankees hat to his look.

Bieber performed on New Year's Eve with Selena Gomez.

We start to see the beginning of some major style risks (neon sneakers!), yet his hair remains as traditional as ever.

Here we see Bieber opt for a more dramatic sweep.

While performing at the Staples Center in L.A., Bieber rocked his tried-and-true look: hoodie under jacket.

The edge! The smoulder! The stance!

Bieber caught up with his old friend Usher, upgrading his favorite vest look with a loose tie.

Bieber looking sharp at the premiere of his 3-D film Never Say Never with his future wife and father-in-law, Stephen Baldwin.

This is the year we started seeing Bieber try new things with his hair, including this sleek, old Hollywood look.

He grew up so fast.

As seen here at the American Music Awards, the singer became increasingly comfortable with hair gel and started to embrace a bad-boy vibe.

More tattoos = more edge.

He got a lot of tattoos in one year. He also started experimenting with hats.

Layering like a boss.

Blond hair, don't care.

After years of intense grooming, Bieber finally let his locks grow out a bit.

Bieber looked suave and understated at the 58th Grammy Awards.

The singer added glasses — and a basketball — to his ever-evolving look.

His big return to the annual celebrity event.

He got in character to wish his fans a Happy Easter on Instagram.

All good vibes at the music festival as he selfied with yodeling Internet star Mason Ramsey.

He stepped out smiling with Hailey Baldwin in the early days of their relationship.

He confirmed his engagement to Hailey Baldwin on Instagram in June, writing, "I promise to lead our family with honor."

Things heated up as he posted this hot tub photo with his then-fiancée.

He was spotted showcasing his street style with LeBron James during New York Fashion Week.

He happily strummed his guitar on the city's streets.

He celebrated his secret September marriage to Baldwin with family, friends and cake.

The Biebs and his bride shared a kiss in the photo booth at their wedding reception.

The husband and wife kicked off the New Year together in paradise.

The Biebers' style influence on one another was evident as they left a lunch in the oh-so-chic city.

While his wife went classic in a column gown by Saint Laurent, Bieber tried some fashion fun in his own Drew House label.