Camila Cabello has shared an adorable message to celebrate "magic human" Shawn Mendes' 21st birthday.

On Friday, Cabello took to Instagram to share a birthday message for the In My Blood singer's milestone birthday - where she also dropped the L-word. “Happy birthday to this magic human, I love you," she wrote, alongside a series of heart emojis. The post shows a polaroid photo of the two of them, with Mendes fixing her hair. Fans took Cabello's use of 'love' to be all-but-official confirmation that she and Mendes are together. "Oh, so y’all dating???" one person wrote. "Shawmila would make a cute couple," someone else added. "SHE SAID I LOVE YOU. I AM NOT OKAY," another said.   The pair, who recently collaborated on the song Señorita, have sparked romance rumours over the last few weeks. And while they haven't confirmed or denied their relationship status, they have been spotted packing on the PDA on a number of occasions - including over the Fourth of July weekend. The musicians have been friends for years, after they collaborated on the song I Know What You Did Last Summer in 2015. She previously told Variety how their song, Señorita, took eight months to create - which she says created a degree of comfort around the process. She continued:

“I’ve known Shawn for such a long time, and it’s so much fun getting to work and do things with somebody who means a lot to you.”