9 Celebrity #TBT Photos You May Have Missed This Week

Michelle Trachtenberg on the set of Gossip Girl kicks off this week’s #ThrowbackThursday.

Michelle Trachtenberg took us back to her Gossip Girl days with this photo of herself with her co-stars Penn Badgley and Chace Crawford hanging out on the set.

Instagram: @michelletrachtenberg

Madonna shared this photo of herself partying in the '90s with pals Kate Moss, Naomi Campbell, and Ingrid Casares.

Instagram: @madonna

Paul McCartney posted this photo of himself during the recording of the album Band on the Run.

Instagram: @paulmccartney

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