1. In honor of her 32nd birthday, Lady Gaga shared this photo of herself in 2007, along with a heartwarming message.
Here’s me in 2007 right before I dyed my hair blonde and released Just Dance. It’s now 2018 and I’m so blessed to be turning 32 with a fanbase of Little Monsters I’ve watched spread a message of acceptance and kindness for 10 years now. 💕 https://t.co/n3dPG7ZQ2H
2. Britney Spears posted a couple of photos from her November 2001 Rolling Stone magazine photo shoot.
3. Heidi Klum shared this clip from when she appeared on the Late Show with David Letterman in 1997.
4. Rob Lowe celebrated the 35th anniversary of his film The Outsiders by posting this cast photo.
5. Barbra Streisand shared this photo from the opening night of the Broadway production of Funny Girl on March 26, 1964.
6. Jamie Lee Curtis posted this photo of herself and her sister, Kelly, posing alongside their dad, Tony Curtis.
7. Will Smith celebrated the 30th anniversary of his and DJ Jazzy Jeff's sophomore album, He's the DJ, I'm the Rapper, by posting the cover art for it.
8. Mariah Carey celebrated the 13th anniversary of her smash-hit single "We Belong Together," by posting photos from the music video for it.
9. Reese Witherspoon shared this fierce photo of herself from 2006.
10. Joan Collins took us back to the '80s with a #TBT from her Dynasty days.
11. In honor of MLB Opening Day, Backstreet Boys posted a very '90s baseball-themed photo.
We’re still waiting on that call up to the big league! #OpeningDay #TBT