How disturbed should I be?

My fifteen month-old daughter can now recognisably recite the names of the Teletubbies:

Tenk Tenk, Dip, (and as clear as anything) Laa-Laa , Po

Thing is, she's only ever watched one Teletubbie video - admittedly about 30 times so far.

And she can predict what's coming next on the video - starts to raise her hands "up high" just before that section starts, etc. Amazing what get's into their developing minds.