When Yoko Ono, Olivia Harrison and Alicia Keys presented the Grammy for album of the year, Swift and her camp suffered a split-second faux pas: they almost began to celebrate a win for the night's biggest award. Oops!
Instead, the trophy went to Daft Punk, their third of the night.
Still, Swift was able to recover with a polite and charming golf clap for the French robots. At least she'll always have this moment.
Check out the video from Instagram user Jimmy Traina, below: