Kevin Richardson looks back at a song he wrote for wife Kristin during a breakup as the two celebrate their 25th wedding anniversary.

Kevin Richardson is looking back at a song with extra special meaning. The Backstreet Boys member, 53, recently shared the story of the band's song "Back to Your Heart," off of 1999's Millennium.

I’m losing my mind,” AJ McLean told a sold-out crowd at Sphere Las Vegas on opening night of the Backstreet Boys’ Into the Millennium ... ballads that had fans hypnotized, like “Back to Your Heart,” ...