British singer Jessie J reveals most amazing party trick ever (VIDEO)

Photo by Anthony Harvey/Getty Images
LONDON, England - Jessie J is a talent vocalist who's tracks have topped charts around the globe.
But it turns out she also has a hidden talent that she revealed on the Graham Norton Show.
Jessie J can sing with her mouth closed.
So how did she discover this incredible ability? Here's the full clip where she explains.
http://youtu.be/o6BXpFBhZZQ?t=1m18s