Need a feel-good moment for your Friday? How about this video from NYC the Blog, showing the self-proclaimed "World's Happiest Boy" playing piano in the subway system. The blog notes that Jason Cordero, a Queens resident, can usually be found in Herald or Times Square (he's also been spotted with a grand piano, above ground.) And yes, his father keeps watch nearby.

Cordero is 12-years-old... which makes us wonder, who's the city's youngest busker?