Katy Perry has teased that she will be embarking on a 'massive tour' by the end of the year, but fans are skeptical.

Perry has been loping around the world on this tour for four months. Her Philadelphia stop was the 33rd city on the Lifetimes Tour, with 39 to go before wrapping in Abu Dhabi at the end of the year.

Those who signed support background checks. — -- More than 150 entertainers and executives, including Katy Perry, Lady Gaga and Billy Joel, have signed a special “Open Letter to Congress ...

Lady Gaga’s Mayhem Ball has officially hit stages across the world, from Coachella to her record-breaking Copacabana show ...

The Pittsburgh event will feature performances by pop star Katy Perry and rapper and producer D-Nice. Oprah Winfrey, Lady Gaga, The Roots, DJ Jazzy Jeff, Fat Joe and Ricky Martin will appear or ...

The Dinah was founded by Mariah Hanson in 1991, and has hosted concerts by stars such as Lady Gaga, Katy Perry, Pat Benatar and The Pussycat Dolls.