People Magazine is reporting that Nickelback frontman Chad Kroeger and singer Avril Lavigne have been hiding a relationship for six months, and are now engaged. Wait, what?  It's really not as creepy as it seems.  Avril is actually 27, and Chad is only 37. And they're BOTH Canadian. They met while working together on Avril's new album in February, and Chad popped the question on August 8th. It will be Avril's second, and Chad's first marriage.