I just saw that commercial with the group of old people singing Viva Viagra to a country tune.
The folks at the company that made Viagra must think they're so clever:
Boss Man-"Johnson, make up a catchy slogan for this penis pill."
Johnson-"Ok, I'll just take a well-known song and change ONE FREAKIN' word in the only part anyone knows to that song. Hmmm... GOT IT! VIVA VIAGRA!!!"
Ugh. Why can't commercials make up their own songs? There's too many of those "change one word" themes.