Adam Wade Gontier is a Canadian singer and musician. He is the lead singer, rhythm guitarist and main songwriter for Saint Asonia, but is best known as the former lead singer, rhythm guitarist, and founding member of the Canadian rock band Three Days Grace. Gontier left Three Days Grace on January 9, 2013. In addition to his work with Three Days Grace and Saint Asonia, he has been involved in collaborations with other bands including Art of Dying, Apocalyptica, Breaking Benjamin, Skillet and Thousand Foot Krutch.

Saint Asonia is a Canadian-American rock supergroup consisting of lead vocalist and rhythm guitarist Adam Gontier, lead guitarist Mike Mushok, bassist and backing vocalist Cale Gontier, and drummer Cody Watkins. In 2017, the band's original drummer, Rich Beddoe, left the band and was replaced by Mushok's Staind bandmate Sal Giancarelli, and one year later bassist and backing vocalist Corey Lowery left the band to join Seether and his place was taken by Gontier's cousin Cale Gontier. The band formed in Toronto, Canada in 2015 after Gontier's departure from Three Days Grace in 2013. Their second studio album, titled Flawed Design, was released on October 25, 2019. On January 26, 2020, Art of Dying drummer Cody Watkins became the new drummer for Saint Asonia replacing Sal Giancarelli.