http://site4sp.googlepages.com/1110.html
I'm watching it. There seems to be several blue ghost-shaped characters - but they sure don't look like Bloo Q. Kazoo to me. The one I think in question (@ 17:46) is clearly furry, has horns, and (I think) sharp teeth.
...too sliky smooth, too long toenail, too many eyes, not enough eyes, too thickly outlined...
(I do see in the same shot the character who my kids call "Eduardo" when reading Where The Wild Things Are - even though we've read that book 100 times before ever seeing Foster's Home...)