Organizers made the announcement Monday.
Tickets for the August 12th concert go on sale to the general public on Friday at 10 a.m.
The 35th annual Musikfest runs from August 3rd to the 12th in Bethlehem.
More headliner announcements are coming soon.
"I'm Yours" / "The Remedy (I Won't Worry)" / "Lucky" / "I Won't Give Up"— #MUSIKF35T (@Musikfest) February 13, 2018
2x GRAMMY-winning singer-songwriter @jason_mraz headlines the Sands Steel Stage on 8/12!
Info: https://t.co/Y85HBnbdEc pic.twitter.com/CGWgbQVtuH