The duet from Shawn Mendes and Camila Cabello has finally been unveiled, entitled 'I Know What You Did Last Summer', and they have now opened up about it in a new interview with b96 Chicago.

During the chat, the pair admitted that they were very nervous to share the track and songstress Cabello joked that she has devoted more time to making sure it's perfect than she has to keeping herself healthy:

"All of the nervous energy. I've been pacing around - I'm really nervous. I think we're both super nervous because we put so much into this song. I feel like I have spent more hours of my life talking to Shawn on the phone than I have peeing or bathing..!"

"Shawn is the one that pees a lot. He's the healthy one out of the two of us. He's my doctor. He'll be like, 'Camila, why aren't you drinking enough water?'"

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Watch a preview of the music video here: