Three Days Grace is a Canadian rock band formed in Norwood, Ontario in 1997 with a line-up consisting of guitarist and lead vocalist Adam Gontier, drummer and backing vocalist Neil Sanderson, and bassist Brad Walst. In 2003, Barry Stock was recruited as the band's lead guitarist. The band is based in Toronto. In 2013, Gontier left the band and was replaced on vocals by Walst's brother Matt.