Here's a good reason to host a party at your house: Use leftover beer to make your hair shiny and lighter. Huffington Post shared how a mixture of beer and lemon will naturally lighten hair and boost shine. I think it has something to do with the acidity and the yeast in the beer, but for certain, I can happily report that it works! The ombre effect is subtle, but the shine factor is obvious. Just don't forget to wash your hair well after the beer, so you don't reek like the day after a dorm room rager.