It’s not every holiday season that we have an angel looking out for us! Lay to rest the constant struggle of staying healthy during the year’s biggest season of parties and feasts. Our December guest editor, model Erin Heatherton, has our backs this year, sharing her top tips for holiday parties from laying on the tunes from start to finish to that next-day green smoothies that will get you back in balance. Stay healthy while still enjoying the festivities this holiday season…