In a behind-the-scenes video released on Dec. 15, pop singers Shawn Mendes and Camila Cabello show off plenty of flirtatious behavior even though they have denied rumors that they are dating.

The video, shared on YouTube, gives fans an exclusive look at what went on while the Fifth Harmony singer and the Canadian popstar filmed the music video for their hit song "I Know What You Did Last Summer."

Between filming, the two teenagers do plenty of goofing off and are constantly flirtatious, especially when Cabello pokes fun at the video concept by calling it "cute" and Mendes pretends to be offended.

Cabello even admits that it's too hard not to start laughing when she and Mendes make eye contact, which they do plenty of times in the video.

When discussing the filming of the rain scenes, Mendes says he's excited and Cabello adds that she is excited as well because they are "really hot." This leads Mendes to add "well I'm really hot," prompting a laugh from Cabello.

The video concludes with both Mendes and Cabello together, wrapped up in towels and thanking fans for watching.

Both Mendes and Cabello have repeatedly denied any romantic involvement, including on a joint appearance on The Late Late Show With James Corden.

However, Cabello's recent reveal that she has dated in secret in the past left fans wondering whether she is only denying dating Mendes to keep their relationship private.

"I dated other people that nobody even knows I ever hung out with, because I didn't want there to be any tweets or selfies or pictures of us holding hands because I wanted it to be just mine and that person's," she told Teen Vogue. 

If Cabello and Mendes are dating than fans will have to keep waiting for the two to discuss it publicly.

"If there were to be tweets or pictures of us, it would be because I was with that person for a while and the relationship was really special and strong enough," she added. 

Check out the video of Cabello and Mendes filming "I Know What You Did Last Summer" below.