1. Orlando Bloom reminded us of the way we used to have to take selfies with this photo of him and Elijah Wood at the premiere of The Lord of the Rings: The Two Towers in 2002.
2. Madonna remembered her late boyfriend, the iconic Tupac Shakur, on what would've been his 46th birthday.
3. Sarah Michelle Gellar shared this very adorable photo of herself.
4. Mayim Bialik remembered the time she met Cyndi Lauper in the mid-'80s.
Happy Birthday @CyndiLauper! Here's a #TBT to being 10 y.o. at the military fashion store, Warbabies in LA. Such an… https://t.co/J2ll2KWHKB
5. January Jones posted these screen grabs from the first season of Mad Men.
6. Gwen Stefani posted this photo in honor of her brother (and founding member of No Doubt) Eric's 50th birthday.
7. Josh Peck shared this behind-the-scenes photo from his 2001 film, Max Keeble.
I ate a lot of the props during this scene. #tbt #maxkeeble
8. Joan Collins took us back to the ’90s when she visited President Clinton in the Oval Office.
9. And finally, Brie Larson posted this awesome photo of her and Cate Blanchett at a BAFTA LA tea party last year.
Should we start a band yes or no? #tbt