Before Selena Gomez was a worldwide pop sensation, she spent her days hanging out with a big purple dinosaur.

The "Hands To Myself" artist appeared to be feeling nostalgic on Sunday, posting a major throwback photo alongside her former co-star Barney from Barney & Friends.

WATCH: Selena Gomez Believes She Hasn't 'Touched the Surface' on Her Acting Career

"Throwback –swag," she captioned the fallback image. 

Gomez played Gianna for 14 episodes on seasons 7 and 8 of the children’s show before leaving in 2004. The program was the first time she and Demi Lovato, who played Angela, appeared on screen together.

Although Gomez loves a good throwback, one thing from her past she says she’s never going back to is Justin Bieber. The 23-year-old actress recently spoke out, revealing she is "so done" with the "Sorry" singer.

WATCH: Selena Gomez Romps in Bed With a Man and Woman During Sexy ‘SNL’ Performance

"To me it was: I'm 18, I have a boyfriend, we look cute together, we like that. Then I got my heart broken and I cared," she told W magazine. "Because people had no idea what was going on, but everywhere it was a million different things I was kind of in a corner, banging my head against the wall. I didn't know where to go."

"I honestly am so done," she added. "I care about his health and well-being. But I can't do it anymore."

Watch the video below: