I didn't answer her right away, because it's a tough one.
Love songs can either be classic, contemporary, or camp.
Classic Some songs will stand the test of time. It's slow, soothing and enchanting. Add Frank Sinatra to the mix, and you have a classic. Check out Ella Fitzgerald's fiery rendition for maximum impact. The Gershwin brothers add a few great numbers to the bin of romantic longing set to music.