A decade and a half after its release, Katy Perry's "Last Friday Night (T.G.I.F.)" debuts on multiple Billboard charts, ...

The pair briefly dated back in 2009 ...

Add Yahoo as a preferred source to see more of our stories on Google. Photo Credit: Sergione Infuso/Corbis via Getty Images Katy Perry is getting candid in her latest release, opening up about the ...

Katy Perry's "The One That Got Away" becomes her highest-rising hit on the U.K.'s streaming chart in half a decade — more ...

Add Yahoo as a preferred source to see more of our stories on Google. Katy Perry's "The One That Got Away" rises to new peaks on multiple Billboard charts while its parent album Teenage Dream climbs ...

She made a short, and much-ridiculed, trip to space. She tried to buy a house and fell foul of public opinion. And she’s found love, apparently, with Justin Trudeau. Time to get up to speed before ...

Cara Delevingne ‘facing biggest fear’ by releasing music - The model’s celebrity friends including Katy Perry and Rita Ora have all showed their support for her new material.