This article is in partnership with SheaMoisture. The world may try to convince you that straight hair is a no-go for the summer heat, but if you’re an It Girl, defying the odds is embedded in your DNA. When it comes to achieving sleek strands for the summer, xoNecole and SheaMoisture have your blueprint for smooth, frizz-free, humidity and heat-damage-resistant hair throughout this season! --- From hair styling oils to bond repairing products, and strengthening shampoo and conditioner, She...