It's Thursday and you know what that means -- it's time to reminisce with our favorite celebs about way back when with Throwback Thursday! We love seeing how cute they were as kids or getting a glimpse at a happy memories they share. We've gathered this week's sweetest, funniest and all-around awesome #TBT pics for you. Enjoy!

Jordin Sparks dug up this hilarious photo of herself and John Mayer from 2009. Despite their goofy expressions, Jordin promises, "John was and still is one of my favorite artists!"

Um, how cute was Ansel Elgort? (Answer: Very, very cute!)

Awww! Kelly Osbourne shared a photo of herself with her parents on her eighth birthday. They all look so different!

Ludacris celebrated #TBT by sharing a pic of himself with Vin Diesel and Tyrese and using the hashtag #fastfam.

Lupita Nyong'o has us cracking up with this picture that was taken "when planking was a thing."

Yes, this is a snap of John Stamos as a Cub Scout.

Jenna Ushkowitz celebrated the 28th anniversary of her move from South Korea to the United States with an adorable childhood pic.

Emmy Rossum shared a totally adorbs pic of herself kissing a dolphin!

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