A to Z Blog Challenge -- U is for Songs That Start With 'Under' / 5 on Friday -- Set 269

This is my fifth year participating in the A to Z Challenge. It's the first year that I wasn't able to complete the challenge by April 30th.
However, like those marathon runners whose main goal is to finish what they started, knowing they'll cross the finish line hours behind the top three, I'm going to carry on and complete the challenge.
Because there are so many participants, many bloggers spend the next few months visiting all of the other participants now that the posting schedule has slow...