The 23-year-old "Stone Cold" hitmaker shared pictures of herself with songwriter Jonas on Instagram and also posted their photoshoot for Billboard magazine.
"Almost 10 years of Unbreakable friendship. I'm so grateful for you @nickjonas. Thank you for always being there for me. Love you and I'm proud of the man you've become!!" she wrote.
The American-born songtress also mentioned, "Our friendship means the world to me. So grateful for you @nickjonas.