Ratings Chart Attack!

Still a dominating show, “American Idol’s” star continues to lose its luster in its seventh season, as the show played to its lowest rating since 2003.

“Idol” was the highest-rated show of the night with an 8.4 rating/21 share, according to preliminary Nielsen numbers, but it was down 5% from last Wednesday.

Of more concern was “Idol’s” 18-34 rating, 6.3/17, one of its lowest showings in that demographic since the show’s first season in 2002.

There was some good news for Wednesday night winner Fox (5.5/12), as “’Til Death” (2.3/7) and “Back to You” (2.7/7) saw increases of 15% and 8%, respectively, from their time-period debuts last week.

A returning “Law & Order” (3.7/10) helped pushed NBC (2.8/7) to second place last night. “L&O” scored its highest rating since its season premiere in January, thanks to Jesse L. Martin’s final episode and a “Deal or No Deal” lead-in (2.3/6).

“Big Brother” continues to hold at its 2.3/7 from last week on CBS (2.2/6), as repeats dominated the rest of the night. The network finished the night in third place.

Fourth-place ABC’s (2.0/5) “Wife Swap” (2.2/7) tied its previous season average, while “Supernanny” (2.2/5) is still 21% off the mark from its average. “Men in Trees” was essentially flat (1.5/4).

“America’s Next Top Model” (2.0/6) and the season finale of “Pussycat Dolls Present: Girlicious” (1.2/3) grabbed season highs last night in several demos on The CW (1.6/4).