1. Lady Gaga celebrated the 10th anniversary of her debut single, "Just Dance," by posting a photo taken during the filming of the music video for it.
2. Tom Hanks remembered the time he guest-starred on The Love Boat in 1980.
3. Vampire Weekend's Ezra Koenig celebrated his 34th birthday by posting a photo from his 10th birthday, in 1994.
4. In honor of Shannen Doherty's birthday, Sarah Michelle Gellar posted a few photos of them together throughout the years.
5. Marlo Thomas remembered her visit to the The Dick Cavett Show in 1971.
Remember Hot Pants? Yep, I wore them and Dick Cavett wasn’t sure what to make of them!! #TBT
6. Zooey Deschanel shared this photo herself alongside her big sister, Emily, in honor of Siblings Day.
7. U2 remembered filming the music video for their hit single, "I Still Haven't Found What I'm Looking For," 31 years ago today.
8. Kal Penn shared this photo of himself at Space Camp in the late '80s.
Look how sexy I was at Space Camp #TBT
9. In honor of his Real Madrid teammate Roberto Carlos' birthday, David Beckham shared this photo of the two them out on the field in the early '00s.
10. Eva Longoria shared this photo of herself, Elizabeth Banks, Kerry Washington, and Reese Witherspoon taken for EW a couple years ago.
Feb 2016, with these beautiful souls. LOVE YOU sisters ❤️ #TBT