1. Ellen DeGeneres remembered when a 10-year-old Alyson Stoner appeared on her show in 2003:
16 years before she was dancing on the #VMAs, @AlysonStoner was dancing on my show when she was 10 years old. #TBT @MissyElliott
2. Will Smith shared this behind-the-scenes photo of himself filming Wild Wild West in 1998:
3. Mark Ruffalo posted this photo of himself from the '80s:
4. Gillian Anderson was also reminiscing about the '80s with her #TBT:
When London meets Grand Rapids in the 80s. #tbt
5. Naomi Campbell shared this fierce photo of herself working the Chanel runway in the '90s:
6. Michelle Pfeiffer posted this photo of herself taken on the set of 1988's Dangerous Liaisons:
7. Shonda Rhimes shared this photo of herself at her graduation from Dartmouth in the early '90s:
8. Ben Schwartz posted this pic of himself from the '00s:
9. Gabriel Iglesias shared this photo of himself and his mom in the late '90s:
Happy #TBT from over 20 years ago. My mom on the left and a young vest wearing, clean shaven, full head of hair having Gabriel Iglesias.
10. Barbra Streisand posted this photo of herself taken on the set of 1970's On a Clear Day You Can See Forever:
11. Denise Richards shared this photo of herself from the '90s:
12. Josh Gad posted a photo of himself in the early-'00s — when he used to rock blonde hair like Eminem:
Just a friendly annual #tbt reminder that I once did this to my hair...for no reason...other than Marshall Mathers was hot at the time. Thank you.
13. Nicole Kidman shared this photo of herself from the early '90s:
14. Halle Berry participated in the #DMXChallenge by sharing this video filled with moments from throughout her career:
15. Jada Pinkett Smith also participated in the #DMXChallenge and posted this vid that took a look back at her career:
16. And finally, Lenny Kravitz paid tribute to his mom, Roxie Roker, on what would've been her 90th birthday, by sharing this photo of the two of them in the early '80s:
#tbt Happy birthday mom. Zoe and I celebrated you last night. Nothing better!