"Wave" is a song recorded by American singer and songwriter Meghan Trainor for her third major-label studio album, Treat Myself. Trainor co-wrote it with Mike Sabath, who produced and sang on it as well. Epic Records released it on September 27, 2019, as the second single from Trainor's third major-label studio album. "Wave" was announced in September 2019 along with its official single artwork.
Trainor performed "Wave" on The Ellen DeGeneres Show and on The Voice.