Ariana Grande

Singer Known for "Thank U Next" & "God is a Woman"

America Ferrera

Award-Winning Actress, Producer & Humanitarian

Noah Centineo

Actor Known for "To All the Boys I've Loved Before"

Michelle Obama

Former First Lady of the United States & Bestselling Author

Yara Shahidi

Award-Winning Actress Known for "Black-ish," Youth Advocate & Voting Activist

Let Curiosity Lead | Yara Shahidi | TED

Ian Somerhalder

Actor Known for "The Vampire Diaries"; Animal & Environmental Advocate; Founder of The Ian Somerhalder Foundation

Rachael Ray

Chef, Cookbook Author & Television Host Known for the "Rachael Ray Show"

Olivia Holt

Actress & Singer

Liza Koshy

YouTube Star & TV Host; Former Vine Star

Nina Dobrev

Canadian Actress & Model; Best Known for "The Vampire Diaries" and "Degrassi"

Tunde Oyeneyin

Peloton Instructor & Makeup Artist; Founder of SPEAK Instagram Live Series

Cassandra Worthy

Change Enthusiasm, Mindset & Leadership Speaker; Disruptive Thought Leader

Pau Gasol

NBA Power Forward, Two-Time NBA Championship Winner, UNICEF Ambassador

Dr. Jennifer Ashton

Board-Certified Ob-Gyn, Author & TV Medical Correspondent

China Anne McClain

Actress, Singer & Dancer; Best Known for Disney's "A.N.T. Farm." & The CW's "Black Lightning"

Michael Oher

Founder of Oher Foundation for Disadvantaged Youth; Former NFL Player for Baltimore Ravens, Tennessee Titans & Carolina Panthers; Super Bowl 47 Champion; Story Told in Movie "The Blind Side"

Jennette McCurdy

Director, Host of "Hard Feelings" Podcast, Former Actress & Author of "I'm Glad My Mom Died"

Dr. Michael Roizen

Chief Wellness Officer at the Cleveland Clinic & Co-Founder of RealAge; Anesthesiologist & Former FDA Advisory Committee Chair

Derek Hough

Dancer, NYT Bestselling Author, Emmy Award Winner for Outstanding Choreography & Six-Time Champion of ABC's "Dancing with the Stars"

Joy Bauer

Nutrition and Health Expert on NBC's "Today Show" & Founder of Nourish Snacks