I gather from (the amazing) Andrea Goss being the ONLY understudy who performed at Stars in the Alley, Michelle Williams will only be playing Sally for paying audiences inside Studio 54.
And if Alan looks bored in TV performances, my guess is because it's always such a sanitized version of the number.
"Grease," the fourth revival of the season, is the worst show in the history of theater and represents an unparalleled assault on Western civilization and its values. - Michael Reidel