Clockwise from left:
BCBG Max Azria Fall/Winter 2011, Imaxtree; Karolina Kurkova, Vanessa Jackman; Redken; Blake Lively, Steve Granitz - WireImage; Emma Watson, Jon Furniss - WireImage; Fekkai

Summer is great and all, but sometimes the weather is just too hot, unbearable and frizz-inducing for a "down day." All you can manage to do is scrape back your hair and just forget about it. Keep it simple -- and sleek -- with these gleamy-smooth shine products. If your hair is longer, pull it into a neat ponytail or ballerina bun; or if you have a short pixie cut, just refer to the always amazing-looking Emma Watson.