Ratings for Fox's American Idol dropped markedly on Tuesday night, averaging "only" 22.4 million viewers, but they nevertheless beat the numbers for ABC's Neighborhood Inaugural Ball (12.6 million), according to Nielsen Research. (Earlier in the day, 37.8 million viewers watched coverage of the inauguration itself on the 15 broadcast and cable networks that covered it; the figure does not include those who watched via the Internet.) Ratings for Idol improved substantially on Wednesday, however, as 26.1 million viewers tuned in. However, those hefty numbers did not do much good for the series premiere of Fox's Lie to Me , which followed. The new drama attracted 13.19 million viewers, just 49 percent of those who watched Idol .