Camila Cabello is all about her beau Shawn Mendes, especially after Sunday’s big win at the American Music Awards.

The pair, who collaborated on one of the summer’s biggest hits “Señorita”, took home Collaboration of the Year at the AMAs and thanked their fans along the way.

RELATED: Camila Cabello And Shawn Mendes Bring ‘Señorita’ To The AMAs Before Camila Hits The Stage Solo

But in a new message to Mendes, the “Havana” singer, 22, shared a sweet shout-out, thanking him for “being there.”

“I love you Shawn Mendes,” she wrote, captioning a few behind-the-scenes shots from the show. “Thank you for being so there for me yesterday and every other day. You have the most caring and beautiful heart in the world!”

She added, “Thanks to all our fans for voting, we love and appreciate you guys so much and are so thankful for you ❤️.”

RELATED: Camila Cabello Drops Music Video And Behind-The-Scenes For ‘Living Proof’: Shawn Mendes Questions Shirtless Man In Video

Cabello took the stage three times Sunday night to perform. She first joined Mendes for a steamy rendition of “Señorita”, before wowing the crowd with a performance of her new single “Living Proof” and joining longtime pal Taylor Swift on stage for “Shake It Off”.

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2019 American Music Awards Arrivals