Overview

• On July 26 the couple attended the Backstreet Boys’ Into the Millennium residency at the Las Vegas Sphere, where Culkin initially admitted to being “mildly skeptical” before calling the show “incredible.”
• A TikTok video on July 28 showed Song dancing enthusiastically to “Everybody” while Culkin remained seated, underscoring their extrovert-introvert dynamics.
• On July 29 Culkin shared an all-white backstage photo with the band and joked about Song “literally crying” during the performance.
• Song posted her own Instagram tribute calling it the “Best night of my life” and thanking Culkin for honoring her long-time fandom.
• The Backstreet Boys responded via Instagram Stories to congratulate the couple and praise Song’s high-energy support.