While Kroeger was working as a producer for Lavigne's self-titled album in 2012, the two started dating. By the time the lead single was released — "Here's to Never Growing Up," which Kroeger cowrote — they were engaged. By the time the album's third single was released — "Let Me Go," which features Kroeger — they were married.
They split in 2015, but continued to work together. Lavigne described her ex-husband as "a really great soundboard" for her sixth studio album, 2019's "Head Above Water." He even lent vocals to the title track.
"I would call him and send him songs to get his opinion, and if I was ever stuck on something, he'd help me out, which is super f---ing cool, if you think about it," she told USA Today. "I'd play him songs on FaceTime and he'd be like, 'I'm so proud of you, you did such a good job.' So he just cares about me and wants to see me do well, which is really nice."