Grande, 25, added a pop of color to her all-black look with thigh-high bright yellow boots.
Her man Davidson, 24, kept it casual in a windbreaker, shirt and jeans.
The outing comes after the songstress dished about his proposal after only weeks of dating while promoting her album "Sweetener."
"It was just really simple and really sweet," she said on the Zach Gang Show. "We were just hanging out, he had a ring, and uh, yeah. He just asked me. It was really sweet. He didn't get on a knee or anything, thank God. That would've been so googly."
She then explained how she never thought she would actually tie the knot.
"I'm not like a very traditional person so the fact that I'm getting married is something I never even saw coming," she said. "I never saw that coming, I never wanted that. I was like f**k that, what's the point. And then I kind of understood it when it was, like, with the right person."
When a fan asked if Davidson was high during the proposal, she joked, "He's always high!"
Watch the video above to see the cute couple!
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