They had to censor the lyrics, but Cee Lo Green and Gwyneth Paltrow didn't hold anything else back at the Grammy Awards.
The duo teamed up for a rendition of the nominated single "Forget You," incorporating the use of a grand piano... and The Muppets.
Paltrow, of course, guest-starred on Glee earlier this season, playing a substitute teacher who impressed her students with her version of Green's song. The pair then hosted Saturday Night Live together a few weeks later. Listen to their latest duet below.