Justin Bieber posted with a cardboard cut out of his past self. My, how he's grown!

Gone is the baby face, though the warm brown eyes and trademark hair are still there (though his mop top did take a break for a bit). It's hard to believe that the 'Boyfriend' singer and 'Baby' hitmaker are even the same person now! One is a young man, the other a little boy. Their looks aren't the only things that are different -- The Biebs' voice is a lot deeper now than it was when he made his debut.

How does Bieber feel about his former self? Apparently he's not a big fan. "I met the old justin today," he wrote. "He was a real p----." Don't be so hard on yourself, Biebs! You're growing up beautifully.