Katy Perry will host and perform at the awards show in addition to Kendrick Lamar, Lorde, Ed Sheeran
From Mariah Carey to Harry Styles to Adele to Michelle Obama, the best, most memorable musical segments on The Late Late Show with James Corden
Winner of #SwishSwishChallenge will appear in upcoming clip for 'Witness' single
Brazilian pop star Gretchen stars in new clip for 'Witness' single
'Witness' singer hopes others can see themselves in her emotional confessionals
Ariana Grande, Coldplay's Chris Martin, Justin Bieber and Miley Cyrus make cameos
British singer/songwriter says prolific BFF Swift doesn’t need defending
Singer scores third consecutive Billboard 200-topping album
Big Sean also contributes to latest star-packed track from electronic producer's 'Funk Wav Bounces Vol. 1' album
'Witness' singer insists she "didn't kill" her old persona in new interview; "I'm not a con artist"
"I was retriggered by a big male that didn't see women as equal," singer said. "And that had been, unfortunately, a common theme in my upbringing"
Country star and former tour mate was one of Perry's special guests during weekend live-streaming event
"I really, truly, want to come together, and in a place of love and forgiveness, and understanding and compassion," singer says
Fans of both pop stars take to Twitter to duke it out over conflicting album release and streaming announcement date
"I wish that I could turn the other cheek every single time, but I'm also not a pushover," singer says of beef