L.A. Times - Pop & Hiss — After a partial stadium evacuation delayed Taylor Swift's first Sydney concert, she powered through the show attended by Travis Kelce, Katy Perry and Rita Ora. more info

New York Post — Katy Perry was seen dancing to Taylor Swift's song, "Bad Blood," which is especially noteworthy because the general consensus is that “Bad Blood” is a diss track that Swift wrote about Perry. more info

L.A. Times - Pop & Hiss — Katy Perry revealed to Jimmy Kimmel on Monday that her time on 'American Idol' will end soon. 'I need to feel that pulse of my own beat,' she said. more info

Stereogum — American Idol is still a TV show, even if it’s no longer any kind of pathway to a music career. (The last few winners have not released albums.) For the last seven seasons, the show has had a consistent judging panel: Katy Perry, Lionel Richie,... more info

E! Online — Despite once proclaiming himself "America's ex-boyfriend," John Mayer still wants to get married one day. The Grammy winner, who has dated Katy Perry and several other fellow celebs in the past,... more info

Stereogum — In The Number Ones, I’m reviewing every single #1 single in the history of the Billboard Hot 100, starting with the chart’s beginning, in 1958, and working my way up into the present. Book Bonus Beat: The Number Ones: Twenty Chart-Topping Hit... more info

New York Post — That's what she gets for waking up in Vegas. more info

New York Post — They made the crowd roar, roar, roar. more info

Stereogum — In The Number Ones, I’m reviewing every single #1 single in the history of the Billboard Hot 100, starting with the chart’s beginning, in 1958, and working my way up into the present. Book Bonus Beat: The Number Ones: Twenty Chart-Topping Hit... more info

New York Post — John Mayer revealed Monday that he still listens to his 2013 duet “Who You Love” which features his former girlfriend Katy Perry. more info