Watch Joe Jonas and DNCE Wish Demi Lovato a Happy Birthday

The band led an adorable sing-along live from London.

Written by Ezra Marcus • Photography by Jo Hale/Getty Images • August 22, 2016

Demi Lovato turned 24 this past Friday, August 20, and Joe Jonas made sure to send his regards. Onstage in Lonon, Joe and his band DNCE led a packed crowd in a rendition of "Happy Birthday" for the singer. "Happiest of incredible birthdays to one of my best friends I'm so glad to have you in my life. Have the best one yet," he added on Twitter.

Meanwhile brother Nick, who is currently on the road with Demi as part of their Future Now Tour, spent the night onstage with the birthday girl in Portland, Oregon, but he didn't let that stop him from sending a birthday tweet:

Just two nights prior, Demi and Nick split some stage time in Anaheim, California, where they were joined by rapper 2 Chainz, who performed his hits "Watch Out" and "I'm Different" simple because he was in the neighborhood. Watch the clips, and check out the rest of Nick and Demi's Future Now Tour dates below.

Nick Jonas and Demi Lovato's Future Now Tour:
8/24/2016—Vancouver, BC—Pepsi Live at Rogers Arena
8/26/2016—Edmonton, AB—Rexall Place
8/27/2016—Calgary, AB—Scotiabank Saddledome
8/29/2016—Winnipeg, MB—MTS Centre
8/31/2016—St. Paul, MN—Minnesota State Fairgrounds
9/2/2016—Cleveland, OH—Quicken Loans Arena
9/7/2016—Nashville, TN—Bridgestone Arena
9/9/2016—Houston, TX—Toyota Center
9/10/2016—San Antonio, TX—AT&T Center
9/12/2016—Dallas, TX—American Airlines Center
9/14/2016—Albuquerque, NM—Isleta Amphitheater
9/16/2016—Phoenix, AZ—Talking Stick Resort Arena
9/17/2016—Los Angeles, CA—The Forum