Article continues below advertisementBrenda Song and Macaulay Culkin are just like us, enjoying a night out filled with nostalgic music and laughter.The couple attended the Backstreet Boys' Into the Millennium residency show at the Las Vegas Sphere on Saturday, July 26. In a fan video shared on TikTok on Monday, July 28, Song, 37, stole the spotlight as she danced with enthusiasm and sang along to "Everybody." Meanwhile, Culkin, 44, sat beside her, decidedly unmoved by the commotion.