Popsugar Celebrity Celebrity Friendships Demi Lovato's Birthday at Ariana Grande Concert 2019 Demi Lovato Rings in Her 27th Birthday With Ariana Grande: "I Love You Tons" 20 August 2019 by Monica Sisavat Solís View On One Page Photo 1 of 10 ADVERTISEMENT () Start Slideshow View this post on Instagram This was too sweet not to post.... before show prayer they did this for my bday 🥺😭 I’m so so proud of you @arianagrande. You fucking killed that!!! I love you tons 💕 A post shared by Demi Lovato (@ddlovato) on Aug 19, 2019 at 3:22pm PDT Share This Link Copy ← Use Arrow Keys → 1 Previous Next Start Slideshow Celebrity FriendshipsCelebrity InstagramsAriana GrandeCelebrity BirthdaysDemi Lovato