'The X Factor' recap: Four acts sing in the semifinals

The four remaining acts on "The X Factor" -- Tate Stevens, Carly Rose Sonenclar, Emblem 3 and Fifth Harmony -- performed two songs apiece in an unnecessarily attenuated two-hour semifinal show Wednesday night. The first song each act sang was of their own choice; the other was selected either by or with input from the mentors.

By Amy Reiter

December 13, 2012