Frontman and songwriter Andy Brown admitted that he wrote new track 'When She Was Mine' about his past relationship with the girl group singer.
"Yeah, it is about Mollie," he told Capital FM. "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.
"But she knows and she's cool and she loves the song and we love The Sats so."
King has already praised the band in the past and has said that she is a fan of the track.
Lawson will release their debut single 'When She Was Mine' in the UK on May 28.
> Exclusive: Lawson debut 'When She Was Mine' remix
Watch the music video for Lawson's 'When She Was Mine' below: