Taylor Swift is 'happiest maid of honor ever' for her BFF

Taylor Swift is known for traveling with a famous girl squad, but this weekend she celebrated with her pre-squad BFF.

A week after grabbing a few Grammys in Calif., Swift was in Pennsylvania to serve as maid of honor for her childhood friend, Brit Maack, whom she met when she was "10 days old." The groom? Swift met him in kindergarten.

The maid of honor shared a throwback pic of herself and the bride:

 And a current photo:

People reports that Swift and Maack's dresses were designed by Reem Acra.

Here's another group shot from the bride's account: