The couple exchanged vows in the backyard of their Los Angeles home in front of about 100 guests.
“It was like the coolest day of our lives," Trainor told "The Tonight Show" host Jimmy Fallon.
"He bringing stupid back, he's an unmanageable maniac."
He donated proceeds to the nation's equality campaign, too.
The star was having none of it after the group appropriated her image.
"He’s a champion, so we’re in heaven.”
"'Cause I'm a lady!" 🎤 🎶
The singer wrote "No Wrong Way" for his gay dads, but had a bigger tale to tell.
Oh, shiitake mushrooms!