Gwyneth's performance included a rendition - and a bootie shake - of I like Big Butts and I Cannot Lie, as well as singing Isn't She Lovely to the host.
The actress has been showing off her vocal skills a lot of late, with appearances on Glee, the musical film Country Strong, and performing with Cee Lo Green at at the Grammys.
And, while we commend her for letting her (big, bouncy) hair down and can't deny she has a good voice, we don't think a new career in the hip hop world is calling just yet.
But she was looking as fab as ever, working a cream fit-and-flare dress with a cool perforated black belt and statement Jimmy Choo heels.
Gwyneth, you rock.
See the hilarious video below...