I think I misunderstood you. Do you mean "smooth songs" as "smooth jazz"?
Smooth songs as in relaxing songs, not songs that feel like a fucking kick in the ballsack.
Think, songs you would put on when you bring a girl home (or guy, if you're that way inclined).
Like this beast:
Credit goes to Bugsy for introducing me to this one:
P.S. Zeke I can't listen to the second one you posted, there's a real high pitched squeeking noise that hurts my ears.