American Idol Rat Pack theme performances air 8 p.m. tonight

Tonight, the five "American Idol" finalists perform songs made famous by the Rat Pack. The show airs 8 p.m. on Fox.

Sources originally reported contestants would sing two tunes apiece, but it now looks as if they'll each sing one tune. "Idol" has struggled to stay within its one-hour time frame in recent weeks.

Will Adam Lambert secure what seems to be his guaranteed spot in the finals? Will Allison Iraheta, the last female standing, impress the judges?

Share your predictions on our "Idol" blog, updated "live" throughout every episode.

This story was originally published April 28, 2009 at 10:20 AM with the headline "American Idol Rat Pack theme performances air 8 p.m. tonight."