In the shower, I came up with a chorus:
For fixing rips and tears and cracks it's been my truest friend,
I've fixed a hundred things with it--even ductwork now and then.
But now that it's not working, I don't know where to start--
I've learned that duct tape can't fix a broken heart.
Real song titles that I discovered while checking whether that title was already used:
"Booze is the Duct Tape of Life"
"Seal My Lips With Duct Tape"