Billboard reports that Katy Perry’s “I Kissed a Girl” is at the top of the Hot 100. It is also a milestone event.

“I Kissed a Girl” also becomes the 1,000th No. 1 of the rock era, which began with Bill Haley and His Comet’s “Rock Around the Clock” in 1955.
From….

To………..

…and her imbecilic, lowest common denominator, [...]