Gwen Stefani and boyfriend Blake Shelton celebrated their duet with Adam Levine and wife Behati Prinsloo.
The 46-year-old singer and 39-year-old country star posed for a selfie with 37-year-old Maroon 5 frontman and 26-year-old model after performing their song "Go Ahead and Break My Heart" on Monday's episode of "The Voice."
Stefani, who advises Shelton's team on the NBC reality competition, shared the group photo Wednesday on Instagram, captioning it with a kissy face emoji. Shelton and Levine serve as judges on the series.
Monday's episode marked the first time Stefani and Shelton have performed their song in public. The collaboration will appear on Shelton's 10th studio album, If I'm Honest, which is scheduled for release May 20.
"It's not like anything that she and I have ever done before," the country star told "Extra" before the performance. "This is such an honest song, just about, you know, kind of how we got started."
"Originally, when I started writing the song, I was just, I was only trying to impress her," he confessed. "You know, just trying to write her a song to get her excited about me. I sent her the song half-finished and she wrote the other half of the song."
Stefani and Shelton confirmed their relationship in November after splitting from their respective spouses, Gavin Rossdale and Miranda Lambert, in months previous. The couple initially met on "The Voice" in 2014.
Levine and Prinsloo, meanwhile, have been together since 2012 and married in 2014. The couple announced they are expecting their first child in March and posed for a baby bump photo this month.