Tapped to perform are singers Jason Mraz, Ed Sheeran and rising newcomer Austin Mahone. Serving as host will be Bridgit Mendler, star of Disney’s hit series “Good Luck Charlie.” The annual Family Day celebration, including games and other carnival activities, raises funds for leukemia, cancer and AIDS research. To date the event has raised close to $5 million for Martell-funded research at 12 research hospitals across the country. Last year’s event honored Train, with performances by Cobra Starship, Cody Simpson and newcomer Ariana Grande.

“T.J. Martell has been a big part of my life in the music business for quite some time,” Diamond tells Billboard.biz. “My family and I are looking forward to a great day.” Paradigm’s client roster includes Coldplay, Janelle Monae, Emeli Sande, Snow Patrol and Sara Bareilles.

Tickets On-Sale:
JULY 3 (PRE-SALE)
JULY 10 (GENERAL PUBLIC)
Ticketmaster.com