1. Mariah Carey took us back to the early '90s, to when she rocked a scrunchie and hung out with Will Smith.
2. While Adam DeVine took us back to the late '90s, when he had love of both Blink-182 and puka shell necklaces.
3. Speaking of the late '90s, Reese Witherspoon posted this pic of herself during her Cruel Intentions-era.
4. Madonna celebrated her 57th birthday by sharing this photo of herself and her ex-husband, Sean Penn, in the mid '80s.
5. Ewan Mcgregor remembered his late friend and co-star, Pete Postlethwaite.
6. Barbra Streisand gave us a peek back to one of her favorite vacation spots, Sun Valley, Idaho.
7. Salma Hayek shared this editorial photo of herself, where she rocked some serious platforms.
8. Mia Farrow posted this pic of herself in some swinging '60s fashions.
The 60s were ending #TBT