What's going on here then? Mel C has denied rumours of a romance with Matt Cardle, but a steamy kiss on-stage at G.A.Y could fan the gossip flames again.
The pair have teamed up for a duet together called 'Loving You', which was officially released on 18 August. They performed the song together at G.A.Y on Saturday night, and re-enacted the steamy snog they share on the single's video.
Matt recently told the South Wales Argus about how the song came about, saying: "We basically met at the Isle of Wight Festival last year. Mel was playing on the same stage as me so we had a quick chat then.
"I then met her this year at a Cancer Research fundraiser. We swapped numbers and I invited her to my concert in London in May. We spoke after the show about writing together."
But after the smoochy video was released, of course, romance rumours circulated. But Mel recently told Digital Spy: "Matt is gorgeous and he's not a bad on-screen boyfriend to have, but we're just mates. We were both so nervous about getting steamy together.
"I've never had to be passionate with anyone in a music video before, so it definitely took some courage."
And, apparently, they had a little practice run in the dressing room before shooting started on the vid. Oo-er.
But, it seems, for now the relationship is strictly professional - but they put on a good show, don't they?