LOOK: NICK JONAS Pens Sweet Birthday Message For DEMI LOVATO!

Nick Jonas penned a sweet note for his best friend Demi Lovato who celebrated her 25th birthday last August 20. A lot of fans were left feeling "Jealous" after the youngest Jonas Brothers member posted a throwback photo during their Camp Rock days and shared how his friendship with the "Sorry Not Sorry" singer grew stronger over the years.

"I admire you so much and am so grateful to have you in my life." Read the rest of Nick's birthday message for Demi here:

What can you say about Nick and Demi's friendship? Tell us in the comments!