Justin Bieber has officially released his new single "What Do You Mean?" but 77 famous friends made sure that it got maximum hype and exposure. From fellow singers to TV personalities, different celebrities have shown different ways of promoting Bieber's new song.

Like Us on Facebook

Host Ryan Seacrest kicked off the month-long teaser followed by Australian model and DJ Ruby Rose and host James Corden, who had an epic car karaoke with Bieber.

Some of the biggest names who took part of his "What Do You Mean?" campaign include superstar Mariah Carey, NBA champion Shaquille O' Neal, pop princess Britney Spears, lifestyle guru Martha Stewart, Grammy winner Ed Sheeran, R&B star Usher, and rockstar Steven Tyler.

 10 hours to go Worldwide! The amazing @britneyspears is excited! :) #whatdoyoumean u ready??? #1day #whatdoyoumean

A photo posted by Justin Bieber (@justinbieber) on Aug 27, 2015 at 5:57pm PDT

Hollywood stars also chimed in their support including Ashton Kutcher, Ben Stiller, Kate Hudson, Mark Wahlberg, Will Ferrell, Alec Baldwin, Kevin Hart, and the great Larry King. Today show hosts Matt Lauer and Savannah Guthrie also allotted some airtime for the countdown promo.

This is a MAJOR story @larrykingnow. What Do You Mean? #4days :) A video posted by Justin Bieber (@justinbieber) on Aug 24, 2015 at 6:03am PDT

Alanis Morissette's theatrics was the most epic of all. There was a clip of Bieber singing her song followed by Morissette jumping on a pool.

 What Do You Mean? @alanis thank you :) #canadians #14Days

A video posted by Justin Bieber (@justinbieber) on Aug 14, 2015 at 5:58am PDT

Other artists and celebrities who supported the 21-year-old singer include Miley Cyrus, Ariana Grande, Kendall Jenner, Kylie Jenner, Luke Bryan, Meghan Trainor, Hillary Duff, Twenty One Pilots, Gigi Hadid, Carly Rae Jepsen, Chris Martin, Jason Derulo, and Jaden Smith.

What Do You Mean? @kendalljenner #5days A photo posted by Justin Bieber (@justinbieber) on Aug 23, 2015 at 8:24am PDT

He also got some love from his younger brother Jaxon, a special dance from Ellen DeGeneres, and most of all a lot of support from his faithful Beliebers.

 Finally!! get #whatdoyoumean on @applemusic now. Let's take it to the top!! Good to be back. http://smarturl.it/iWDYM

A video posted by Justin Bieber (@justinbieber) on Aug 28, 2015 at 4:30am PDT

The music video of "What Do You Mean?" will premiere after the VMA's.

TagsJustin Bieber, What Do You Mean, Countdown to What Do You Mean?