Britney Spears’ latest single, “Slumber Party,” is off and running, and it’s showing no signs of slowing down! Not only did the video hit over 2 million views in less than twelve hours of premiering, but it has also now officially taken over the number one spot on the USA Music Video iTunes charts! “Slumber Party” is the second single off Britney’s ninth studio album, “Glory,” which has now re-entered the top 100 on the iTunes album charts here in the United States thanks to the help of the song’s release.