Three Days Grace have just unveiled a new song! The fresh cut, 'Painkiller,' sounds like classic Three Days Grace, although the track is the band's first to feature new vocalist Matt Walst.

Original Three Days Grace vocalist Adam Gontier left the band in late 2012, with the group announcing Walst as Gontier's replacement in early 2013. Gontier wrote a detailed 'Address of Resignation' soon after news of the singer switch had been made public. The singer alluded to drug addiction in the letter, but claimed to be sober.

Three Days Grace quickly followed up Gontier's statement with one of their own, claiming that the singer had abruptly quit and only made the band aware of this through his lawyer. Gontier would later criticize Three Days Grace's musical direction on the band's fourth full-length 'Transit of Venus.' “The music really wasn’t coming from the heart," wrote Gontier. "I can say that on the record ‘Transit of Venus,’ there’s maybe one or two songs that actually do come from my heart, but a lot of songs have been written just for radio and for fans, you know, to relate to."

Regardless of where Three Days Grace has been, the band is moving forward with Matt Walst:

We are happy to announce that Matt will be a part of Three Days Grace. Matt has been on the road with us, and has been writing with us since 2003. Bringing Matt into the 3DG family is a no-brainer…he’s always been in it.

Check out Three Days Grace's brand new song 'Painkiller' above! 'Painkiller' will become available to buy on April 1 via iTunes.