Three Days Grace has announced that Matt Walst, lead singer of My Darkest Days, will be joining the band as the lead singer for their North American co-headlining tour with Shinedown, starting in Moline, IL on February 1st.
 
Former lead singer, Adam Gontier, has left the group effective immediately.

CLICK HERE FOR THE OFFICIAL STATEMENT FROM 3DG.

Here's audio of Matt rehearsing with Three Days Grace. What do you think?