Here's how it went down: the 22-year-old singer stunned in her eggplant-colored Donna Karan couture gown that we couldn't help but notice was almost the same color as Lena Dunham's Zac Posen frock.
But, alas, as Swift strolled the carpet and the flashbulbs kept flashbulb-ing, she found out just what's so tricky about the dreaded racerfront silhouette and its ensuing bra dilemma. Do you... go braless? Try for a strapless? Opt for adhesive pasties?
Taylor apparently chose that last one, as part of her stick-on bra was visible was she turned to the side. (The Daily Mail has an even better photo.)
It's okay, Taylor. Maybe you can write a Grammy-winning song about the perils of sideboob?
Scroll down for more photos.
See more wardrobe gaffes!
Want more? Be sure to check out HuffPost Style on Twitter, Facebook, Tumblr, Pinterest and Instagram at @HuffPostStyle.
Do you have a style story idea or tip? Email us at email@example.com. (PR pitches sent to this address will be ignored.)