PASADENA, CA - JANUARY 08: (L-R) Judges Randy Jackson, Mariah Carey, Keith Urban and Nicki Minaj of "American Idol" speak ons
Frederick M. Brown

Not even Mariah Carey and Nicki Minaj's cat fights can save American Idol’s dwindling viewership.

Last night, the show attracted 13.1 million viewers with 3.8 million in the key 18-49 adult demo that advertisers want to see (aka a 3.8 rating), Entertainment Weekly reported. Now, 13 million tuning in is nothing to gawk at, but the ratings are depressing.

The Wednesday night numbers mark Idol's lowest ratings since its 2002 debut—before Simon Cowell was a household name when it opened with a 4.8 rating.

The singing competition saw millions more viewers tune in for past seasons—37 million viewers tuned in to its 2007 premiere. The show had a promising 10.2 rating and 17.6 million viewers to start this season, but the episodes have declined since the first episode.

For the first time, the show came in second in the ratings race to Modern Family, as the sitcom sneaked past with a 3.9 rating. An additional note of concern: main competitor The Voice consistently churned out ratings in the 4/5 rating range last season.

Wonder if FOX is kicking itself for the millions it spent on Carey now.