Popstar and X Factor host Olly made a return to the stage before the results were announced as he serenaded the studio audience with his vocals.
And after his performance, Olly and Caroline, who have been flirting a lot in recent weeks, did little stop viewers thinking they are more than friends.
After his post-performance chat, Olly proceeded to kiss Caroline on the cheek not once, not twice, but three times! After the third kiss, which left the studio audience cheering, Caroline looked straight into Olly's eyes but told him a firm "no" while laughing.
The kissing spree continued for Olly, who ended up kissing a fish on The Xtra Factor during a game of Kiss or Tell.
Earlier this month, Caroline admitted her relationship with Olly isn't entirely "platonic".
Addressing the chemistry between her and the 'Troublemaker' singer, Caroline told You magazine: "Me and Olly have a lovely relationship. It's a weird chemistry. We have the innate understanding of one another, we don't fancy each other and yet we don't not fancy each other.
"We're not girlfriend and boyfriend, yet we're not totally platonic either."
On Saturday's show, the co-hosts flirted as they introduced the theme for the weekend. Olly said: "It's love and heartbreak. Love because Caroline, I'll always love you."
Caroline responded: "And heartbreak, because Olly, it's never gonna happen. Oh sorry!"
Despite jokingly appearing to be heartbroken, Olly still cheekily stole a kiss from his co-host as she stood next to him.
Read some tweets about Caroline and Olly during Sunday's results show:
Olly and Caroline just get together already #XFactor— Adam Fraser (@AdamFraserUK) November 22, 2015
Dear Caroline and olly. Kiss and get married guys!— TinyLeeshy (@LeeshChapman) November 22, 2015
you could see how tempted Olly and Caroline was to kiss on the lips then— melissa (@melissaleighxox) November 22, 2015
Omg the way Olly and Caroline are together makes me so happy! They are adorable!!! I want a kiss off olly— Holly||Olly Murs!! (@HollyParker23) November 22, 2015
Seeing videos of Olly Murs and Caroline Flack together from X factor this weekend and they are so cute— Sam Murdoch ✌️ (@SamMurd) November 23, 2015