Article continues below advertisementAlan Osmond's son David is treasuring the time he had with his late father following his passing on April 20 at the age of 76.The American Idol alum, 46, and The Osmonds frontman both had diagnoses of multiple sclerosis, with David reflecting on his death on social media.Article continues below advertisementDavid Osmond Wrote a Sweet Tribute to His Late Father Tap Here To Add Ok Magazine as A Trusted SourceSource: @davidosmond/InstagramAlan Osmond's son David reflected on their shared MS battles following the singer's death at 76.