Mel C and Matt Cardle have got steamy on stage at London's G-A-Y nightclub, sharing a kiss in front of the crowd.
The Spice Girl and the former X Factor winner share a smooch in the music video for their new single Loving You, and set the rumour mill spinning as they recreated the kiss as they performed the duet live.
Mel C retweeted a message from one fan who posted a picture of the kiss and said: "OMG! Look at you two right here! There's definitely something going on between you guys! GO ONN!"
The pair have denied rumours they are dating, but Mel, 39, teased in a recent interview the chemistry between them may have continued off screen.
"We are both technically single but I think, in this instance, I should try and maintain a professional relationship... unfortunately!" she said.
Mel split from partner Thomas Starr last summer after 10 years together. She has a four-year-old daughter Scarlet.