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Watch Fifth Harmony Perfectly Harmonize Justin Bieber's 'What Do You Mean?'

16 more days!

What do you mean we have to wait 16 days until Justin Bieber's new single?

That is the question all of the Beliebers, and Fifth Harmony, are asking themselves.

The 5H girls are the latest stars to help support Justin's upcoming single, and in their oh-so-adorable fashion, Fifth Harmony decided to perfectly harmonize the song's title, "What Do You Mean?"

Camila starts off the singing before pointing to Dinah, who takes things over. The rest of the girls -- Ally, Normani and Lauren -- all chime in as their voices perfectly blend as they sing "what do you mean" before giving Justin a personal shout-out.

Seems like Ed Sheeran might have some competition when it comes to making a Bieber original song. Just yesterday, Ed belted out his creative acoustic take on the track.

5H and Ed join a long list of celebs who have helped Justin with the countdown to his "fun" and "summery" single. Kylie Jenner, Mariah Carey, Ariana Grande and Big Sean, just to name a few, have all lent their support, and their photos, to JB's brand new track.