Little did Avril Lavigne, 27, know that romance would be in the air when herself and Nickelback frontman Chad Kroeger, 37, got together in February to co-write a song for her new album. Now, 6 months later they are engaged to be married! "A romantic relationship blossomed as they spent time writing together," says one of Avril's close friends. Chad popped the question with a 14-carat diamond ring, bling bling catching! "He makes her so happy," says a family source. Aww bless! Avril was previously engaged to Sum 41 frontman Deryck Whibley in 2009, Chad has never asked the question before. We wish the lucky two the best of luck! (people)