3.Salma Hayek posted this photo in celebration of BFF Penélope Cruz's 42nd birthday.
4.Ben Affleck wished his beloved Red Sox luck with his #TBT pic.
5.Amy Sedaris took us back to her Strangers With Candy days.
6.While Madonna took us back to her mid-'90s Miami days.
7.Dane DeHaan shared this adorable photo of his 7-year-old self.
8.Lindsay Lohan posted this photo and captioned it, "Feels so good, reminiscing."
9.And finally, in celebration of National Superhero Day, Sarah Michelle Gellar shared this pic from when she and Jack Black co-hosted the 2002 MTV Movie Awards.