1.In honor of her 75th birthday, Dolly Parton shared this gorgeous photo of herself from the '70s:
2.Miley Cyrus honored her godmother Dolly Parton's birthday by posting this clip from one of her appearances on Hannah Montana:
3.Kate Bosworth shared this photo of herself and Chris Evans in the late '90s:
4.In honor of Michelle Obama's 57th birthday, Barack Obama posted this photo of her from the late '80s, along with a sweet caption:
5.Bryce Dallas Howard shared this photo of herself being carried by her dad, Ron Howard, while he directed a movie in the early '80s:
6.In honor of Regina King's 50th birthday, Janet Jackson posted these screenshots of the two of them from their 1993 film, Poetic Justice:
7.LL Cool J shared this clip from when he performed at Bill Clinton's inauguration in 1993:
8.Trixie Mattel posted this college-age photo of herself in the late '00s:
9.In honor of Kate Moss's 47th birthday, Naomi Campbell shared a bunch of photos of the two of them from throughout the years:
10.Jon Bon Jovi remembered when he and Rihanna performed "Livin' on a Prayer" together in 2010:
11.Sarah Michelle Gellar paid tribute to Buffy on the character's 40th birthday:
12.Victoria Beckham celebrated Emma Bunton's 45th birthday by posting this photo of the two of them — during their Spice Girls days — at the 1997 MTV Europe Music Awards:
13.Tyra Banks shared these photos of herself and Susan Holmes McKagan modeling some Todd Oldham clothing in 1993:
14.Morgan Freeman jumped on the Bernie meme trend by sharing this one of Bernie superimposed onto his and Tim Robbins' 1994 film, The Shawshank Redemption:
15.Finally, Betty White celebrated her 99th birthday and shared the news that her long-lost '70s TV series, Pet Set, would be released: