In a tear-jerking video, Mary-Lou Versteegh sings "You Are My Sunshine" with her granddaughter, Nicole Coenen, 24. It's one of the only things she remembered as she battled Alzheimer's. Nicole visited her grandmother once a week. Together, the two sang the song hundreds of times. Nicole strung the recorded duets into a montage she'll use to remember her grandmother forever. InsideEdition.com's Keleigh Nealon (http://twitter.com/KeleighNealon) has more.