Remembering Olivia Newton-John's best 'Grease' moment, singing "Hopelessly Devoted to You" as Sandy. ... Up until now, we’ve not truly understood the power of Sandy and Danny’s connection.

Rande Gerber and Cindy Crawford as 'Grease' couple Danny and Sandy. Michael Kovac/Getty Images. Butler and the Gerbers were just some of the celebrities who kick-started Halloweekend at the event.