ariana grande

From Nickelodeon stars to YouTube sensations — these former kid actors and child stars are entering their 30s this year!

It's no surprise Jennifer Aniston's hair — a.k.a. "The Rachel" — made the list.

Apparently, Lady Gaga even liked one of the videos.

She’s staying in her own “little bubble” for now.

From Gwen Stefani to Miley Cyrus and John Mayer, these pop stars have written breakup songs about other famous people.

Did your favorite make the list?

Would you name your baby after your fave pop star?

Some of your favorite stars will be rubbing shoulders with one another.

Could this mean a new era of music?

These interviewers were so out of pocket.

Let's just say it's not one her favorite songs...

Ariana Grande will replace Nick Jonas.