The fifth-season "Idol" finalist has joined an expanding group of guest stars for the CBS crime drama's upcoming 100th episode, entertainment publication reported Saturday.
Also signed on for guest spots are rapper Nelly, actor Scott Wolf, former NFL star Marshall Faulk and actress Julia Ormond.
People said the episode will follow a story line in which individuals named Mac Taylor, the name of the series' lead character, are targeted by a killer.
The magazine said Daughtry will play a character named Machiavelli Taylor, while Willis and Wolf will be featured as other Mac Taylors.
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