On July 1 1988, Madonna made a surprise unscheduled appearance on NBC-TV’s Late Night With David Letterman. Sandra Bernhard was David’s scheduled guest.
On July 1 1988, Madonna made a surprise unscheduled appearance on NBC-TV’s Late Night With David Letterman. Sandra Bernhard was David’s scheduled guest.
Today In Madonna History 
Theirs was a complicated and testy friendship!