New Directions takes to the football field to perform a mash-up of Michael Jackson's ''Thriller'' and the Yeah Yeah Yeahs' ''Heads Will Roll.'' Says star Kevin McHale, who plays Artie and takes lead vocals on the song, ''We found out on tour that we were going to be on after the Super Bowl. No matter how long the show goes, no matter what, we won't have more viewers than this. And that's crazy. I was thinking about that, like possibly 34 million people will hear me do a Michael Jackson song. I'm good. I can die happy.''