Nick Jonas I'm a Big Pianist ... Don't Be 'Jealous'

12/17/2014 6:00 PM PST

Nick Jonas -- I'm a Big Pianist ... Don't Be 'Jealous'

TMZ TV

Nick Jonas killed it on the famous giant piano at FAO Schwarz in New York City ... playing his new hit song. And with a new show, new physique and hot GF -- we're declaring Nick the winner of 2014.

Yep, the whole damn year. Now check out his footwork!