This is wrong for a lot of reasons, but specifically, the voice they gave Ken sounds like he's 50 and has been smoking crack through a road flare.
"Hiya Barbie! Wanna go for a ride?"
[youtube]http://www.youtube.com/watch?v=hwu6NrxVVFk[/youtube]
And I don't think it's appropriate that Ken does the hip-pump move when he says "Let's go party!"