While Carrie Underwood's dress lit up Staples Center last night, Katy Perry's revealing, light green gown was the Grammys' true eye-popper. Like, whoa.
Despite CBS' directive urging stars to "please be sure that buttocks and female breasts are adequately covered," the singer donned this dress Sunday.
"I was inspired by Priscilla Presley in the '70s," Perry explained on the red carpet when asked about her jaw-dropping look. "The big hair, closer to God."
Or something. Needless to say, Katy Perry's dress quickly became a trending topic on Twitter after she appeared on the red carpet, setting fans abuzz.
The consensus was that it wasn't a great look for KP - unless you're a straight guy - and that John Mayer was the big winner of the 2013 Grammy Awards.
Take a look at more Katy Perry photos from last night: