Basically, you have to use letters from the alphabet and do this.
A = AwesomenessTV
B = BrizzyVoices
C = Cookie Monster
D = Danger Dolan
E = Ellen Degeneres
F = Fred
G = Glozell
H = ?
I = ?
J = Jimmy Fallon
K = KittiesMama
L = LDShadowLady
M =
N = Nerdy Nummies
O = our2ndlife
P = Promise Phan
Q = ?
R = Ricky Dillan
S = SevenSuperGirls
T = Tyler Oakley
U = ?
V = ?
W = ?
X = ?
Y = ?
Z = Zoella
A = AwesomenessTV
B = BrizzyVoices
C = Cookie Monster
D = Danger Dolan
E = Ellen Degeneres
F = Fred
G = Glozell
H = ?
I = ?
J = Jimmy Fallon
K = KittiesMama
L = LDShadowLady
M =
N = Nerdy Nummies
O = our2ndlife
P = Promise Phan
Q = ?
R = Ricky Dillan
S = SevenSuperGirls
T = Tyler Oakley
U = ?
V = ?
W = ?
X = ?
Y = ?
Z = Zoella