Jon Lajoie

Comedian, Actor, Musician & Internet Celebrity

Aaron Kelly

Country Singer Who First Appeared on Season 9 of "American Idol"

Best Coast

Indie Rock Band Known for Their Garage Rock, Surf Pop and Lo-Fi Sound

Marvin Sapp

Founder & Senior Pastor of Lighthouse Full Life Center Church

Eric Paslay

Country Music Singer-Songwriter

Talib Kweli

Rapper, Emcee, Activist & Entrepreneur

Cassie

R&B Singer, Model, Dancer and Actress

Lucy Hale

Actress & Singer; Best Known for "Pretty Little Liars"

Emily Kinney

Actress Best Known for Her Role as Beth Greene on "The Walking Dead"

Sarah Darling

Country music singer/songwriter know for her hit songs, "Something to Do with Your Hands," "Little Umbrellas" and "Jack of Hearts"

Chamillionaire

Award-Winning Rapper; Known for the Hit, "Ridin'"

Mikko Hypponen

Computer Security Expert; Chief Research Officer at WithSecure & Principal Research Advisor at F-Secure

If It's Smart, It's Vulnerable

Maria Conchita Alonso

Singer-Songwriter; Latin Actress; LGBT Rights Activist

Carol Grace Anderson

Singer, Actor, Motivational Speaker & Author of "Get Fired Up Without Burning Out!"

Jasmine V

American R&B and Pop Singer

Val Chmerkovskiy

Season 20 Champion & Professional Dancer on "Dancing With The Stars"

Ben Tankard

Former Professional Basketball Player, Gospel Producer, Recording Artist & Author

Colleen Ballinger (Miranda Sings)

Comedian, Actress, and Singer; Best Known as her Internet Character "Miranda Sings"

Kali Hawk

Actress, Comedian & Model; Best Known for "New Girl"

Breathe Carolina

American Electronic Rock Musical Duo; Known for "Blackout"