Nick Lachey singing 98 degrees is a treat any time, any day, but especially when his adorable daughter is in the mix. The heartthrob and father of three serenaded his 3-year-old daughter, Brooklyn, and wife Vanessa Lachey caught the sweet moment on camera. She posted the video on Instagram, writing, "Daddy's girl forever," and our hearts melted the moment we pressed play. Nick sang the iconic '90s song "I Do (Cherish You)" as Brooklyn wrapped her little arms around his forearm and snuggled into her dad. Her insanely cute smile says it all! Prepare for an audible "aww" as you watch the mini concert for yourself.