Because Matt Giraud was saved from elimination by the judges on “American Idol,” which means that two performers are guaranteed one-way tickets home on Wednesday night.  To earn a place in the Final Five, the contestants will have to sparkle as brightly as the mirrored ball that will spin above their heads.  Yes, it’s Disco Night, and Randy Jackson thinks the singers will have the step up their games to stay on the dance floor. (CLICK ON THE MEDIA BAR BELOW)