Avril Lavigne and Nickelback's Chad Kroeger (“#Chavril”) just announced their engagement joining the ranks of celebrity music couples like Jay-Z and Beyonce, Selena Gomez and Justin Bieber, Blake Shelton and Miranda Lambert and Skrillex and Ellie Goulding. The Canadian pair is one of music's most lucrative match-ups, but they're not quite the top power players who we've ranked by total combined album sales.
