India, Aug. 4 -- A video of Hollywood couple Ashton Kutcher and Mila Kunis at a Backstreet Boys concert has gone viral, capturing the couple dancing, singing, and sharing a sweet, almost-kiss moment in the crowd. Filmed at the Sphere in Las Vegas on Saturday, the clip shows the longtime pair fully immersed in the band's 1999 hit I Want It That Way, dramatically mouthing the lyrics to each other and clearly enjoying the nostalgic night out.

At one point in the video, Mila playfully points at Ashton before pulling him in close. He wraps his arms around her waist, and the two nearly kiss before laughing and jumping along to the music. "They stole the show on this one with a little fun. They were both gracious to the crowd and fans around th...