Brian Karlsson for The New York Times In April, Hozier reached No. 1 on the Hot 100 with the bouncy “Too Sweet,” becoming the first Irish artist since Sinead O’Connor to claim the top spot.

On Tuesday, the talk show host performed a cover of Hozier's Unheard single, "Too Sweet," during the Kellyoke segment of her talk show. Wearing a black dress, and surrounded by My Band Y'all ...