I haven't seen all the vlogs, but this is my favorite from the ones I have seen.
"If I was doople then I'd have doubles of the dooples." (Nick)
The look on Zak's face after Nick says this. *giggles*
It comes from this conversation.
Nick: Maybe it's my doopleganger from Waverly Hill.
Nick: I like dooplegangers. They're funnier than doplegangers.
Aaron: They're the new kind.
Nick: What about you? You're the doplegangers. But if I was doople then I'd have doubles of the dooples.