Shawn Mendes and Camila Cabello's flirtation is out of control! They've gotten pretty flirty on Instagram, and now we're seeing it in full force behind-the-scenes of their "I Know What You Did Last Summer" music video.

When the Fifth Harmony singer talks about something cute on set, the "Stitches" singer riffs, "Is it cute?"

And later, when Camila jokes, "We're really hot," Shawn responds by saying, "I'm really hot." Looks like someone is trying to show off!

Watch the BTS video below, and let us know if you think they'd make a cute couple in the comments!