Just follow them UPDATE

I won't spoil anything. Just CLICK and let them tell or show you who they are! (And I really hope I didn't forget someone... )

Kurt Hugo Schneider
Max Schneider 
Sam Tsui 
Luke Conard 
Landon Austin 
Peter Hollens 
Jake Broido 
Kimmi Smiles 
Dave Days 
Megan Nicole 
Alex G 
Alex Goot
Tiffany Alvord 
Lindsey Stirling 
The salt lake pops 
Alex Boye 
Chester See 
Tyler ward 
Against the current 
Corey Gray 
The Mend 
Andy Lange 
Cody longo 
PTX 
R5 
Jason Chen 
matty B
The pianoguys 
Andrew Garcia 
The warp zone 

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Future sunsets 
Gardiner sisters
Georgia Merry
Set It Off
Will and the People
Rixton
Alexander di Leo
Conor Maynard
Nick Pitera
Todrick Hall
IM5
Tanner Patrick
Two worlds 
Anthem Lights
Carrotsquare
Evynne Hollens
Guillaume De Grieve
James Maslow
Madilyn Bailey
Mike Tompkins
NiknJaps
Payson Lewis
Joey Graceffa
Christina Grimmie
Anth Melo
Paint

The next guys/girls are not singers but Vloggers of have an amazing Channel! 

Ryan Higa
D-Trix 
Matthias
Joule Thief 
Bad Weather Films 
Jacob and Josh Fu 
Justin James Hughes
Megan Batoon
The brothers Riedell 
Will
The Slowmoguys
Brett 
Devin Supertramp 
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Joe Sugg
Alfie Deyes
Caspar Lee
Zoë Sugg
Tanya Burr
Jim Chapman
Oli White
Marcus Butler
Niomi Smart
Mark Ferris
Jack Maynard
The Hillywood Show
Cinemates
Superfruit
Potkast
Sawyer Hartman
Tyler Oakley