4 Year-Old Sings Bruno Mars "Grenade"

If being cute was an Olympic sport; this kid wins ALL the medals.

Watch the adorable-as-heck 4 year-old "Kai" sing you to sleep with his PITCH-PERFECT cover of Bruno Mars' "Grenade" on Ellen. Ok, maybe not 'pitch perfect,' but I have to admit it -- I think he can pull more chicks than Bruno himself.

--Justin