Never heard of #ThrowbackThursday? To put it simply, it's an excuse to relive some of your favorite memories...and, of course, share them for all the internet to see!
Everyone from Jessica Alba to Mario Lopez to Naya Rivera have celebrated #tbt with hilarious childhood pictures. Check out the 25 best celebrity throwbacks:
1. #TBT: Nicole Richie
Did you know Nicole Richie was an aspiring violinist? She posted this adorable picture with the caption: “Dreams DO come true. Well, this one didn’t, but a lot of them do.”
2. #TBT: Gisele Bundchen
How unfair is this? Even as a child, Gisele was drop-dead gorgeous.
3. #TBT: Selena Gomez
Selena is all smiles next to her friend, who happens to be sporting a Barney shirt! Coincidentally, Selena’s first job was a role on Barney and Friends. “No matter who you are, where you are from and what you want to do with you life,” Selena wrote, “Please never give up. I love you all for believing in me.”
4. #TBT: Wilmer Valderrama
Wilmer Valderrama posted this picture of him and his familia in Venezuela in 1988. The cutie was just eight-years-old! (Plus, how stunning is his mamá?!)
5. #TBT: Jessica Alba
Hilarious! Jessica Alba posted this picture of her goofing off with her primos during a camping trip.
6. #TBT: Adriana Lima
Wow, remember this impressive Victoria’s Secret lineup? The Brazilian beauty posted this picture of her with Heidi Klum on the VS yacht.
7. #TBT: Gina Rodriguez
Actress Gina Rodriguez posted this adorable picture of her and her papá! We just want to squeeze those chubby cheeks!
8. #TBT: Mario Lopez
Before he was a famous actor and heartthrob, Mario Lopez was a kid champion...in wrestling! Even at six-years-old, Lopez already had the beginnings of a serious set of guns.
9. #TBT: Fergie
That gorgeous blonde is none other than Black Eyed Peas frontwoman, Fergie!
10. #TBT: Michelle Rodriguez
Believe it or not, that little girl clutching her doll is Fast and Furious star Michelle Rodriguez!
11. #TBT: Paulina Rubio
The American Idol judge posted this picture with the incredibly appropriate caption: “Recordando los años dorados.” The golden years, indeed...
12. #TBT: Alessandra Ambrosio
Seriously? Alessandra Ambrosio has always been drop-dead beautiful...even as a baby-faced teen!
13. #TBT: Adrienne Bailon
Adrienne Bailon, along with her sister and a friend, look chic and stunning in these incredible flapper costumes!
14. #TBT: Naya Rivera
Oh, man, that oversized sweatshirt. We’re having serous 90s flashbacks over here...
15. #TBT: Enrique Iglesias
And the winner for cutest kid EVER goes to...
16. #TBT: Pitbull
Woah! We hardly recognized the cubano without his sunglasses on!
17. #TBT: Becky G
Becky G posted this picture with the hilarious caption: “#tbt to my Dora the explorer days. Haha”
18. #TBT: Tyler Posey
Teen Wolf star Tyler Posey posted these pictures of him, his father, and his brother. Wow, that’s one attractive family…
19. #TBT: Sara Paxton
We can’t get over how cute Sara Paxton was as a child! She posted this picture of her dressed up as a kitty-cat with the caption: “Later that day, I redrew this with sharpie.”
20. #TBT: Alexa Vega
Long before Machete Kills, Alexa Vega and Robert Rodriguez collaborated on the Spy Kids trilogy!
21. #TBT: Francia Raisa
Actress Francia Raisa and her sister, Italia, pose with these playful leis on a Hawaiian vacation.
22. #TBT: Christian Serratos
Que preciosa! Christian Serratos clutches her abuela in this adorable throwback.
23. #TBT: Victoria Justice
“#ThrowbackThursday Eatin’ ice cream like a boss in ’96,” Victoria Justice posted on Instagram.
24. #TBT: Cierra Ramirez
How 90s is that outfit? The Fosters star Cierra Ramirez poses for the camera in this adorable throwback.