She's not in there.
4 seconds sound clip from the Spaceballs movie soundboard.
You can hear this line at 00:26:32 in the Blu-ray version of the movie.
Quote context
[...]
- So, Princess Vespa, you thought you could outwit the imperious forces of Planet Spaceball.
(PNEUMATIC SLIDING DOOR OPENING)
- We're picking up the outline of a Winnebago.
- Here comes the Badyear blimp.
[...]