Taylor Swift's (slightly erratic) Grammys performance

Taylor Swift performed at Sunday night's Grammys. The big takeaway? She whipped her hair back and forth ... a lot.

E! reminds us that 'All Too Well' is allegedly about actor Jake Gyllenhaal, Swift's ex.

But tonight was just Taylor and her hair.

To be fair, it looked a lot different than it did on the red carpet right before the show, when she sported a pretty ponytail. After her performance, there was plenty of talk of T. Swift's whippin'.

Many viewers were not into the hair flippin'. Tons of people took to Twitter, callin it flippin' crazy.

Still, there were some positive comments. Some people compared her to the late great hair icon Farrah Fawcett.

Oh, and she did give plenty of angry face during (and especially at the end of) her song.

Here's hoping she hasn't broken up with her chiropractor.