The 'Jealous' hitmaker has taken to Instagram to share photos of him and Demi, captioning them, 'I admire you so much and am so grateful to have you in my life.'
Nick shares throwback photos of him and Demi on the photo-sharing platform. One of the photos sees them striking fierce poses for the camera. The other photo, meanwhile, will surely make fans feel nostalgic as it features Nick and Demi playing guitar together during their Disney days.
"Happy birthday @ddlovato we've seen a lot of life together already.. much more to come as well," Nick writes in the caption. "I admire you so much and am so grateful to have you in my life. Wish I could be with you today to celebrate! I know you won't ever let me live it down that you're a month older than me."
The "Close" crooner isn't the only one who shows his love for the "Cool in the Summer" songstress. Ellen DeGeneres takes to Twitter to post a hilarious montage from Demi's appearances on "The Ellen DeGeneres Show". Ellen tweets alongside the video, "Happy birthday, @DDLovato! Sorry not sorry I made this montage for you."
Kelly Clarkson keeps her birthday wish simple, writing, "Happy Birthday @ddlovato, Hope you have an amazing day."
Happy Birthday @ddlovato 🎉🎉🎉Hope you have an amazing day 😊— Kelly Clarkson (@kelly_clarkson) August 20, 2017
Demi expresses her gratitude for everyone around her, including her fans, on the micro-blogging site. "My life could not be more fulfilling. I have the most incredible fans, loving friends and family and all of your bday wishes make me so happy," she writes. "Thank you SO much!!! I love my LOVATICS!!!"
My life could not be more fufilling. I have the most incredible fans, loving friends and family and all of your bday wishes make me so happy— Demi Lovato (@ddlovato) August 21, 2017
Thank you SO much!!! I love my LOVATICS!!!— Demi Lovato (@ddlovato) August 21, 2017
The "Sorry Not Sorry" singer also posts a photo of her donning a sheer navy top which she pairs with purple patterned pants. "Birthday mood," she captions it, along with a heart emoji.