"Wonder" is a song by Canadian singer Shawn Mendes from his fourth studio album of the same name. The song, which serves as the album's lead single, was released on October 2, 2020, by Island Records. The track was written and produced by Mendes, Scott Harris, Nate Mercereau and Kid Harpoon. The single reached the top-ten in Canada, Hungary, and Singapore, as well as the top-twenty in twelve countries including Australia, the United Kingdom, and the United States.