Gather 'Round for Grease Lightnin', Young Thetans 2.52K Jeff Neumann 11/08/10 06:51AM Filed to: open caption open caption John Travolta Scientology Qantas Australia Gettypic [John Travolta sings songs from "Grease" at the Qantas Airways 90th birthday celebration in Brisbane, Australia. Way to pick the winning team! Image via Getty]