I always heard / sang "love" there. "Luck" just doesn't flow for me, lyrically (for me, at least, to sing). I sing it more like "luh---viz, baby" rather than "love - is - baby", so "luh---kiz, baby" just doesn't work for ME.
Storywise, luck works better than love, IMO. But I'm taking my liberties and going home.
"Once in awhile, you can get shown the light in the strangest of places, if you look at it right." - R. Hunter
"If we had any nerve at all, if we had any real balls as a society, or whatever you need, whatever quality you need, real character, we would make an effort to really address the wrongs in this society, righteously." - Jerry Garcia