Today is Zayn Malik's 22nd birthday! It's hard to believe that the Bradford bad boy is growing up so fast – it feels like yesterday he was 17 years old and auditioning for X Factor.

The One Direction guy channeled his inner Taylor Swift on Twitter this morning and wrote:

We hope he blasted TayTay's "22" and rang in his b-day the right way!

To celebrate Zayn's birthday, we found 22 mind-blowing throwback pics that will surely give you nostalgia. Click through, then let us know which photos you love the most in the comments below. Don't forget to wish Zayn a happy birthday, too!