Jonas, Turner, and dozens of their famous friends and family members turned out and turned up for the couple's party Saturday night at Mama in New York City.
The Blast broke the story that the two celebrated their engagement by shutting down the restaurant and throwing a massive karaoke rager.
You gotta watch Joe kill it on karaoke to his own song, "Cake By The Ocean."
Joe's soon-to-be wife also brought her skills to the party. The "Game of Thrones" star showed off her own talents: fake sword fighting with a flaming bottle of alcohol.