Kate Beckinsale

Kate Beckinsale, star of Underworld and Much Ado About Nothing, is allergic to coconut according to this interview with Delish.
Kelly Clarkson

Singer, songwriter, author, and host of The Kelly Clarkson Show is allergic to peanuts, according to her Twitter feed.
Khloe Kardashian

Khloe Kardashian, socialite and star of Keeping Up with the Kardashians, is allergic to coconut per this interview with Us.
Kristen Cavallari

Fashion entrepreneur, jewelry designer, and star of Laguna Beach: The Real Orange County, Kristen Cavallari, has a milk allergy according to this interview appearing in Us.
Malia Obama

Malia Obama, activist and eldest daughter of President Barak Obama and First Lady Michelle Obama, is allergic to peanuts according to this article from USA Today.