Nick Jonas, Kelly Clarkson and More Send Sweet Birthday Messages to Demi Lovato

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The Disney alum shared kind words for his former co-star

These kids have come a long way together!

Nick Jonas posted a loving birthday message on Instagram to his fellow Disney kid Demi Lovato for her birthday on Sunday.

The performer shared a glamorous shot of the two looking very old Hollywood with the caption, "Happy birthday @ddlovato We've seen a lot of life together already.. Much more to come as well. I admire you so much and am so grateful to have you in my life. Wish I could be with you today to celebrate!"

He also shared a shot from their movie Camp Rock, and teased Lovato in the caption, writing, "I know you won't ever let me live it down that you're a month older than me." 


Other stars like Kelly Clarkson and Ellen Degeneres shared their birthday wishes, along with Demi's mom, Dianna De La Garza, who shared a beautiful shot of her daughter all smiles at an event.

Lovato turns 25 on Sunday, and shared her own birthday photo, looking chic in some athletic wear, with the caption, "Birthday mood."

ET caught up with the singer last week, who revealed her unexpected birthday plans for next weekend in Las Vegas.

“I am going to the Conor McGregor-Floyd Mayweather fight,” she said. “I'll go with friends… yeah, that's what I think about when I think about my 25th birthday. I don't even have a party planned. I'm just thinking about the fight.”

The singer also has cause to celebrate, with a new album, tour and documentary on the horizon. The doc will take viewers on her journey to making the highly anticipated new music. 

"I want people and viewers to see my journey," she explained. "I want them to learn about my life today rather than thinking about my life in the past. A lot of people have heard my story, I've been very open about it, but a lot of people don't know what my life is like today and I get to share that with my fans, which is so important to me."

For more on the birthday girl, check out the video below!