Miranda Lambert and Gwen Sebastian surprised the audience attending Anderson East's Valentine's Day show at Pearl Street Nightclub in Northampton, Mass., when they joined the singer onstage to sing backup during his cover of Mariah Carey's "Always Be My Baby."

Lambert stood on the stage with a beer in hand as she and Sebastian provided accompaniment to East, who was all smiles in front of the packed club. While East sang the song, Lambert could be seen singing and dancing along while taking a swig of her beer on the stage. Towards the song's end, East joined the two women by their microphone to sing together.

Lambert and East confirmed that they were dating in January when Lambert posted a photo with her new beau alongside a caption that read "the snuggle is real."

Since then, Lambert has shared some moments with her new boyfriend on social media like last month when she regrammed East's Instagram video before the college football National Championship game. The video itself showed two pigs dressed up in University of Alabama gear while the soundtrack of “Sweet Home Alabama” played. Lambert, however, showed her loyalties to Texas as she captioned the video: "Somethin' bout a boy from the south"... #Bama @andersoneast @prissy_pig #piglovebiglove #Texasgirlinacrimsonworld #rolltide #hookemhorns."

The two singers will also be featured on producer Dave Cobb's forthcoming Southern Family concept album.

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