All hail the new ruler of Twitter, Katy Perry . Perhaps riding a wave of momentum from the release of her new album, Prism , she has become the most-followed person on the social media site, surpassing Justin Bieber .
That's a pretty narrow gap between the two, and Justin is helping his cause with his "Music Mondays" program, which he promotes heavily on Twitter. He just released his latest tune, " Bad Day ," this morning. Justin is releasing a new song every week until December 16.
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