We do not have an entirely up-to-date list, but the following list is valid as of August 2014 (Updated Oct. 15th, 2014 with help from 16waltlu):

16waltlu
AskAmbassador
CoolCutePopular
CrazyPoopHead
Cutiepink20
DiNkYThEDiNoSaUr
emiIygirlxD
Jabriacutiepie
Mee4You
Modehfy
Naomi1444
PurplePeacesign5
Queenpenguin7
RedHeadRuby
Sauliia
Suchablonde22
TheRealChanelle
TurnMuhSwagOn
XiomaraCM
xxDiego103Lovexx

If anyone would like to compile an up-to-date list, it would be greatly appreciated!