Of the nearly 50 million singles she's sold, which are the most gym-worthy?
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With Teenage Dream, Katy Perry became the first woman to release five No. 1 singles from one album. (The only other album that has ever accomplished this feat is Michael Jackson's Bad.) On the odd chance this seems like a fluke, it's worth noting that Perry recently became the most popular person on Twitter, with more than 47 million followers.

Whether breaking records or making them, the lady is a force of nature. You can channel some of that energy for your workout by downloading a few of her relentlessly optimistic anthems. In the list below, you'll find Ms. Perry collaborating with Kanye West, remixed by Calvin Harris, and roaring on her own. Katy Perry - Walking on Air - 128 BPM

To find more workout songs, check out the free database at Run Hundred. You can browse by genre, tempo, and era to find the best songs to rock your workout.