Evidence that love does not exist.

A decade ago carrie underwood and kelly clarkston had never even known love (according to interviews they gave)

Now both carrie underwood and kelly clarkston are in love with their significant others (according to interviews they gave)

I cannot tell one change in their voice when they sing a love song or when they sing a heartbreak song from a decade ago until now. How could the passion in their voice from a decade ago be the same as now when they didn't know love back then.