Bruno Mars, the Black Keys, Avril Lavigne and City and Colour are set to play the MuchMusic Video Awards next month.
They will join previously announced performer Lady Gaga at the June 19 bash, to be co-hosted by teen star Selena Gomez.
Mars was the most nominated artist at this year's Grammy Awards with seven nods.
The Black Keys, meanwhile, beat out the Arcade Fire at the Grammys to win best alternative music album.
The MMVAs, which take place at MuchMusic's downtown headquarters, are known for a raucous, street-party atmosphere.
Lavigne made a splash at the show a few years ago by mooning the crowd, revealing "MMVA" written on her backside.