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.
9.And finally, in honor of the 26th anniversary of Saved by the Bell, Mark-Paul Gosselaar and Tone Bell recreated the classic Zack Morris and A.C. Slater beefcake photo.