"Who should be next celebrity in space?" joke

The media attention given John Glenn's mission has convinced NASA to give more celebrities a shuttle ride in the name of science.
Who should be next, and why?
George Michael - "Friction in a Weightless Environment."
Hanson - "Analysis of the *_Mmmmm-Bop_* Comet."
Dan Quayle - "Vacuum vs. Vacuum: Which is Emptier?"
Pamela Anderson Lee - "Survey of Heavenly Bodies."
(original source unknown)