Who Sings That ‘La La La’ Song? Naughty Boy & Sam Smith
I stumbled on this song on YouTube and the dang thing was stuck in my head for hours. It's called 'La La La' and features a little kid singing the chorus. The song was released by British producer Naughty Boy with vocals for the song done by Sam Smith.
Turns out, it's already been a chart-topper around the world.