I had trouble keeping a straight face when someone had "A Whiter Shade of Pale" - really!
And I have a true story about "Another one bites the dust" - I once had cause to phone a LIFE insurance company re a letter they'd sent me regarding the cause of death of one of my patients. I was disputing it as being incorrect, so while they checked their records, put me on "hold" on the phone - and THAT was the song that came up!

And on a more serious note: "Crossing the Bar", as sung by Craig, Morgan and Robson - for my Dad, who was in the Navy and is now 92, when the time comes. It was Lord Tennyson's last poem before he died, and has been set to music beautifully by Rani Arbo.