Tearjerking videos document the decline of a gran

Tearjerking videos document the decline of a grandmother who was gradually robbed of her memory by dementia - but never forgot the words to her favorite song.

Mary-Lou Versteegh adored the popular track ‘You Are My Sunshine’, and always sang it to her granddaughter Nicole Coenen, 24.

But in 2009, when the WWII survivor was diagnosed with Alzheimer’s and moved to a nursing home, the roles reversed.