Chorus.fm — Katy Perry has become the first person to reach 100 million Twitter followers. Most are bots. more info

New York Times — “Witness” debuted at the top of the Billboard album chart with 180,000 album equivalent units, displacing Halsey, who hit No. 1 last week. more info

Idolator — Congrats! The post Three In A Row! Katy Perry’s ‘Witness’ Debuts At #1 appeared first on idolator. more info

Stereogum — In addition to announcing a #1 debut for Katy Perry's Witness , Billboard's report on this week's Billboard 200 albums chart contains some news about a welcome policy change: As of this week, streaming data and individual track sales for various art... more info

Idolator — A find. The post Katy Perry’s Demo Of Britney Spears’ “Passenger” Is Here & It’s Magnificent appeared first on idolator. more info

411 Mania — Calvin Harris has released a new track called “Feels”, which you can listen to on Spotify. The track features Katy Perry, Pharrell Williams and Big[.........] more info

Chorus.fm — Calvin Harris has released his new song “Feels” on Apple Music. The track features Katy Perry, Pharrell Williams, and Big Sean. more info

CNN Showbiz — more info

New York Times — Three female pop stars, three different approaches: a conversation about their new albums, on Popcast. more info

PopSugar UK — While we're all hoping against hope that the feud between Katy Perry and Taylor Swift will die soon, the "Swish, Swish" singer's new song with Swift's ex-boyfriend, Calvin Harris, will likely dredge up just a little bit of drama. Shortly after break... more info