Katy Perry’s ‘Dark Horse’ video IS a sight to behold – and it’s been so popular it topped the list of most-watched music videos of 2014 so far!

As expected, Katy Perry nets her first No. 1 album on the Billboard 200 as "Teenage Dream" arrives in the top slot with a career-high sales frame of 192,000. Perry also tops the Digital Songs chart… ...

Katy Perry completes the quickest ascent to the top of Billboard's Pop Songs radio airplay chart in more than five years, as "California Gurls," featuring Snoop Dogg, zooms 5-1 in its sixth week on… ...

Songs of the Summer is your soundtrack stop for the solstice. With songs from Beyonce, Katy Perry, Justin Timberlake, Carly Rae Jepsen, Outkast, Beach Boys, Daft Punk, Beastie Boys, Public Enemy ...