Katy Perry

While Katy Perry sidestepped the direct question about having a boyfriend, her reported ex John Mayer praised the singer for her work ethic during a radio interview.

You love who you love, regardless of gender, skin color or religion. That should be the governing principle of life in general -- but it's most certainly the case in the song and video for the John Mayer and Katy Perry duet 'Who You Love.'

Katy Perry has been named a UNICEF Goodwill Ambassador. She also performed at the organization's ninth annual Snowflake Ball in NYC (Dec. 3), looking sparkly in silver and resplendent in red while at Cipriani Wall Street.

The 2013 American Music Awards were rife with amazing performances from Katy Perry, Ariana Grande, One Direction, Rihanna, Miley Cyrus, Justin Timberlake, Christina Aguilera, Pitbull featuring Kesha and more. And you can catch them all here!

You probably know Katy Perry...but have you ever heard of Jodi DiPiazza?

Even though Katy Perry's first marriage ended in divorce after only 14 months, the singer's relationship with reformed Lothario John Mayer is going so well (despite that hiccup this past spring), that sources say it's pretty certain that they will get engaged.

There are few things more difficult to see than kids who are are stuck in hospitals because of serious illnesses. But, that being said, there are few things more inspiring than seeing those kids letting loose and having fun. Check out this video of patients at Children’s Hospital at Dartmouth-Hitchcock rocking out to Katy Perry's hit "Roar":

We all knew Katy Perry and John Mayer were getting serious -- but who knew they were getting serious so fast? Sources say that John Mayer have already popped the question to Perry ... and he didn't get the response he'd hoped for.

The 2013 MTV Video Music Awards are a place for artists to take risks and show off their fiercest style. Unfortunately, sometimes style can be so fierce that it, well, bites. Check out the best and worst dressed ladies of the evening below...

The gold truck that Katy Perry hired to promote her upcoming album, 'Prism,' was hit by a drunk semi-truck driver.