Justin Bieber's star-filled countdown just keeps growing! Steven Tyler, Kevin Hart, and Ellen Degeneres [1] are the latest celebrities to help Justin tease his upcoming single, "What Do You Mean?" With his single dropping on Friday, Justin has pulled out the big guns and enlisted none other than rock legend, Steven Tyler, to promote his upcoming single. All month, Justin has been recruiting several other famous faces — including new collaborator Mariah Carey [2] and Kylie Jenner — to promote the song.
The 21-year-old Canadian first spoke of the headline-grabbing single [3] when he stopped by On Air With Ryan Seacrest and announced its release date as Aug. 28. Justin explained that the pop ballad was written about girls, saying, "Well, girls are often just flip-floppy." He added, "They say something and they mean something else. So . . . what do you mean? I don't really know — that's why I'm asking." Keep reading to see all the stars who are helping to build anticipation for Justin's single, then watch a room full of cute guys totally destroy Justin's "Where Are Ü Now [4]."
Kevin Hart
Mark Whalberg
Michael Bublé
Jiffpom
Jaden Smith
Chris Paul
Cauet Officiel
Todrick Hall
Kate Hudson
Ashton Kutcher
Maejor
Florida Georgia Line
Hilary Duff
Gigi Hadid
Larry King
Ellen Degeneres
Kendall Jenner
Ben Stiller
Chris Martin
Carly Rae Jepsen
John Leguizamo
Little Big Town
Jason Derulo
Cody Simpson
Joel Houston
Doug the Pug
Elvis Duran
Tyler Oakley
Jack Gilinsky, Jack Johnson, Sammy Wilk and Skate Maloley
G-Dragon
Xenia Deli
King Bach
Dan Myers and Shane Mooney
Martin Garrix
Usher
Luke Bryan
Little Mix
J Balvin
Halsey
Big Sean
Ariana Grande
Shaquille O'Neal
Ashley Benson
Ryan Seacrest
Kylie Jenner
Josh Ostrovsky
Ruby Rose
James Corden
Mariah Carey
Ed Sheeran
CL
Madison Beer
Christina Perri
Alanis Morissette
Meghan Trainor
Tony Hawk
Randy Mancuso
Elliot Tebele
Fifth Harmony
Twenty One Pilots
Ryan Scheckler
The Today Show's Matt Lauer and Savannah Guthrie
Hailee Steinfeld
Austin Mahone
Tori Kelly
Steven Tyler
