Dying for smooth, straight hair like Vampire Diaries actress Katerina Graham? Celebrity hairstylist Peter Butler recently told me that castor oil--yes, castor oil--is a great way to whip up this kind of look-at-me shine. "It's a hairstylist secret, and it's the most fantastic, affordable styling product that will work on any hair type. It actually conditions hair as it styles," he says, noting that he uses it on models with every hair color and type, from Chanel Iman's dark, straight locks to Marisa Miller's bouncy, blond waves. Butler's oil of choice is the $3.39 Allways Natural Castor Oil, and he suggests applying some product to your palms, rubbing hands together, then applying the oil to hair by running your fingers through the ends. Finish by running a flatiron over the length, then watch out for blinding shine!