![Lady GaGa Dances To No. 1 As iTunes' Beat Gets A Little Bit Slower [100 And Single]](http://cdn.elbo.ws/posts/1449275_lg.jpg)
Over the holidays, Billboard 's song charts were, at least on the surface, pretty sleepy. On the Hot 100 , most of the songs that were hot late last fall—Beyoncé's "Single Ladies" and "If I Were a Boy," T.I. and Rihanna's "Live Your Life," Kanye's "Love Lockdown" and "Heartless," Taylor Swift's "Love Story," the unkillable Katy Perry's "Hot N Cold"—continued bumping around the Top 10 like lazy molecules. But below the surface, a ton of music was being consumed. In particular, one song benefited massively from the annual iPod-filling digital megasale that hits iTunes every Christmas—and [...]