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It's a familiar story among aging divas: same stage, new face.

Or in this case, faces.

American Idol returns Wednesday for a 12th season, hoping to combat a significant ratings drop last season -- amid competition from newer shows like The Voice and The X-Factor -- with a new judging roster.

So gone are Jennifer Lopez and Steven Tyler. And in are -- in case you missed the press release -- Mariah Carey, Nicki Minaj and Keith Urban, joining hold-over Randy Jackson.

Here are five things to watch for as the new season kicks off on CTV and Fox.