Songfacts®:

• Lawson are a four-piece British Pop-Rock band comprising lead singer Andy Brown, drummer Adam Pitts, guitarist Joel Peat and bassist Ryan Fletcher. Their name comes from Dr David Lawson, a surgeon who successfully operated on Brown when he had a brain tumor. This is their debut single, which was released in the UK on May 28, 2012.
• Brown had a relationship with The Saturdays singer Mollie King before breaking-up in January 2011. He told Capital FM this song is about the girl group singer. "She's my ex and we split up and I wrote quite a few songs about it and 'When She Was Mine' was one of them," he said. "But she knows and she's cool and she loves the song and we love The Sats so."
• Brown was formerly a member of boyband Avenue, alongside Max George of The Wanted.