Andrei Mihai
In their homeland. They may be underclass, but [tag]Sum 41[/tag] are heroes in the eyes of a few Canadians. The band’s fifth studio album, “Underclass Hero,” topped the Canadian album charts this week on unremarkable sales of just over 9,000 copies, Nielsen SoundScan reports. This is the first album they made without the guitarist Dave Baksh. They are doing fine in the U.S. where they are at No. 7, selling 45,000 copies. Back in the…