Derek Whibley and Avril Lavigne buy into Bel Air

I'm guessing that Avril makes a lot more money than her hubby, Derek Whibley of the Canadian rock band Sum-41,. I don't think Sum-41 has sold enough albums to cover what they paid for their new house in Bel Air = about $9.5 million. Of course the pad has 8 bedrooms and 10 bathrooms.