1. In honor of her friend Selma Blair's birthday, Sarah Michelle Gellar shared this photo of THE KISS between the two of them in Cruel Intentions.
2. Pink posted this photo of herself hanging out with her "first love" Jon Bon Jovi in the early-'00s.
3. January Jones gave us a ~high fashion~ photo for her #TBT.
4. David Beckham posted this photo (where he bares a striking resemblance to his son, Brooklyn) in honor of his mother's birthday.
5. Mick Jagger shared this photo of himself from the '70s.
6. John Stamos celebrated the return of Fuller House (and what will be the 30th anniversary of Full House) with this sweet photo.
7. Sam Claflin shared this adorable photo of himself in honor of his 31st birthday.
8. Barbra Streisand remembered her dog, Sadie, who was a gift from the cast of Funny Girl.
9. Dolly Parton posted this photo of when she appeared with her goddaughter, Miley Cyrus, on The Voice last year.
What a fun time with @PTXofficial and @MileyCyrus on @NBCTheVoice last year! This bunch is so talented it's hard to… https://t.co/fPLxufLkMv
10. Mandy Moore shared this photo of herself dancing as a kid — while wearing a very snazzy Mickey Mouse leotard.
11. George R. R. Martin posted this photo of himself in New York in the late-'70s.
Circa 1978 at @NYBG (New York Botanical Gardens), during greener days. #TBT
12. Kylie Jenner shared this very cute photo of herself with big sister Kendall in the early-'00s.
13. And finally, Gal Gadot shared this behind-the-scenes photo from the set of Wonder Woman.
Always laughing with these two 😘😋 #TBT #WonderWoman #Grateful