The first song that popped into my head was Vidalia by Sammy Kershaw. I couldn't think of anything more country than being named after an onion.
cowash: Tresemme Naturals
rinse out: Garnier Triple Nutrition
Leave in: Suave naturals, whichever scent I'm into at the moment
gel: Garnier Fructis or LA Looks
3a-3b - high porosity