I always thought it was 'Grease'; Cosmos doesn't quite sound right.
http://www.youtube.com/watch?v=iH2a30LTeWw
PS, Suzy, why don't you just send a letter first.
J Travolta
C/o Randi Michel
William Morris Endeavor Entertainment
9601 Wilshire Blvd
3rd Floor
Beverly Hills, CA 90210
United States of America
Good luck with that!