When did American Idol Season 7 Episode 21 air?
American Idol Season 7 Episode 21 aired on March 12, 2008.

Last night, American Idol's Top 12 sang their hearts out in hopes of winning America over. Tonight, the finalist who received the fewest votes will be eliminated from the race for the American Idol crown. Also Katharine McPhee performs live.
Direct answers for episode-level questions and details.
American Idol Season 7 Episode 21 aired on March 12, 2008.
This episode runs for approximately 85 minutes.
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