Ariana Grande Makes a Surprise Appearance at Barbra Streisand's Concert to Perform 'No More Tears' - Watch!

Ariana Grande just surprised the crowd at Barbra Streisand‘s concert!

The 26-year-old “thank u, next” singer performed alongside the 77-year-old music icon on Tuesday night (August 6) at Barbra‘s United Center concert in Chicago, Ill.

PHOTOS: Check out the latest pics of Ariana Grande

Ariana and Barbra performed a rendition of the classic “No More Tears (Enough Is Enough),” which Barbra originally sang with Donna Summer, and the crowd went wild!

“The best night of my life,” Ariana wrote on her Instagram Story later that night.

“I’m gonna go pass out. You’re just gonna find 10 pounds of hair,” she joked immediately after the performance.

“cherishing this moment forever @barbrastreisand,” she wrote on Instagram.

Watch footage from Ariana Grande‘s Instagram Story inside…