Watch Jessie J Sing 'Bang Bang' With Her Mouth Closed

Jessie J can’t just sing, she can do it with her mouth closed. That’s right -- closed.

During a recent appearance on BBC’s The Graham Norton Show, the 26-year-old singer shared her hidden talent for being able to speak, and sing, with her mouth tightly shut.

“I discovered when I was little that I could pretend I was in a box,” she explained of her secret gift, before belting out a close-mouthed rendition of her Grammy-nominated song “Bang Bang.”

Scroll to 1:23 to see Jessie J’s skill in action. Trust us -- you’ll be supremely impressed.