Gretchen Rubin

New York Times Best-Selling Author of "The Happiness Project;" Host of Podcast "Happier with Gretchen Rubin"

Secrets of Adulthood: Simple Truths for Our Complex Lives

Keri Glassman

Nutritionist, Author, Founder and CEO of Nutritious Life

Amanda de Cadenet

Founder & CEO of #Girlgaze

Christian Siriano

Fashion Designer, CFDA Member, Mentor on Project Runway

Nicole Richie

Actress & Television Personality Known for "The Simple Life"; Fashion Designer, House of Harlow; Co-Founder, The Richie Madden Children's Foundation

Kelly Osbourne

Fashion Designer, Singer & Actress; Former Contributor to E!'s "Fashion Police"; Daughter of Ozzy and Sharon Osbourne

Jillian Michaels

Leading Fitness Expert, Certified Nutritionist, Renowned Life Coach & Powerful Entrepreneur

Aaron McCargo Jr.

Celebrity Chef Known for "Big Daddy's House" on Food Network; Entrepreneur & Founder of the Mentoring Program "Play to Win"

Chef Aaron McCargo Jr. prepares his Broccoli Chicken Cheddar Stromboli

Jay Manuel

Former Judge on "America's Next Top Model", Host of Canada's "America's Next Top Model"

Stacy London

Style Expert and Media Maven, Former Co-Host of TLC's "What Not to Wear," New York Times Best-Selling Author, Founder & CEO of State Of Menopause

Stacy London | PEOPLE