Everyone here know that Chantal Strand voices Diamond Tiara, but on deviantART in theChantal Strand Collageby ~rkerekes13, I found this funny reaction from a Chantal fan that found out she voices Diamond Tiara:

~skullzproductions Mar 16, 2013 what the? Cassie & Bijou are DIAMOND TIARA?! [barf begins to build up] i think i'm gonna be sick...  

LOL that was funny!