The rumor mills have been circling as to whether the pair's steamy embrace in their new music video for "Loving You" has translated into real life.
In fact, their on-screen performance was so convincing, that everyone wants to know if the singer is romantically linked to fellow singer Cardle.
Chisholm happens to be newly single after breaking up with long-time boyfriend Thomas Starr last year, so we're sure she could do with a distraction.
According to The Mirror, Cardle split from dancer Sarah Robinson around the same time.
The Mirror reports their steamy embrace caused so many heads to turn it was trending on Twitter on Tuesday.
Chisholm coyly revealed how she and Cardle have been practicing their kissing scenes in private before getting in front of the cameras.
"As they were setting up this particular scene, Matt and I were chatting and I told him I'd never done this before. He was like 'OK, that's cool', and then went off to get changed next door," she recalled.
"Suddenly, I heard him shouting at me to come in. I thought 'Oh, s**t, I've done something wrong.”
"Anyway, he turned to me and said, 'I'm not being funny but it's really weird kissing someone for the first time in front of a room full of people. So, er, do you mind if we practice first?'"
Mel C did not mind the suggestion at all, in fact she was rather open to the idea and even though it was "genius".
"It was lovely... and because it made us all a bit giggly, it really brought us together," she added.
When the reporter pressed her to answer about a possible budding romance between the two of them, the singer was reluctant to answer.
The reporter stated that after "six seconds of slightly nervous giggling from Mel followed by five seconds of total silence," the star offered a response.
"We are both technically single but I think, in this instance, I should try and maintain a professional relationship... unfortunately!" she pondered.
Well that is not exactly a no is it? According to The Mirror reporter, it seemed that the pair may well be an item, and that the star was trying to show public discretion.
The singer did admit that kissing Cardle on-screen, certainly did not feel like work.
"To be fair, it's not a hardship snogging Matt Cardle," she cooed.
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