The Mariah Carey-Nicki Minaj feud might not be enough to rescue "American Idol's" ratings.
Fox's singing competition entered its 12th season Wednesday with three new judges and sharply lower viewership. An average of 17.8 million total viewers tuned in to the two-hour premiere, slumping 19% compared with last season, according to Nielsen.
The decline among viewers age 18 to 49 -- the group most sought by advertisers -- was also 19%, suggesting that "Idol" continues to lose its grip on younger viewers.
In a news release, Fox called the decline "expected" and noted that the network still beat the combined results of ABC, CBS and NBC.