1. In celebration of Liam Hemsworth's 31st birthday, big brother Chris Hemsworth posted this photo of the two of them in the mid-'90s:
2. In honor of next week's inauguration, Vice President–elect Kamala Harris shared these photos of herself, her sister Maya, and her mother Shyamala Gopalan Harris in the '60s. The vice president–elect captioned the photos by talking about her late mother's influence on her life:
3. Nicole Richie celebrated her daughter Harlow Madden's 13th birthday by sharing this photo of the two of them in 2008:
4. In honor of what would've been David Bowie's 73rd birthday, Michelle Pfeiffer shared this photo of herself and him from their 1985 film, Into the Night:
5. Janet Jackson took it back to the early '00s with this very pretty #TBT photo of herself:
6. Jimmy Fallon remembered when he appeared on the cover of YM Stars in 2002:
Hahaha I’m just gonna leave this here. #TBT
7. Missy Elliott shared this video of herself and Mary J. Blige performing together in the late '90s, in honor of the Queen of Hip-hop Soul's 50th birthday:
8. Gwen Stefani posted this photo of herself on the red carpet of the 1998 VMAs, as well as a photo of herself recently re-creating the outfit for her music video for "Let Me Reintroduce Myself":
9. Ryan Seacrest took it back to his radio DJ days in Atlanta in the '90s:
Back when I headlined malls #tbt