James Corden, Christine Baranski also starred in melodramatic 'Late Late Show' sketch featuring only Perry lyrics
"I'll never cease to be a champion, an ally, a spotlight, and a loving voice for all LGBTQ-identifying people," National Equality Award winner says
Video sharing app that lets you lip-sync to 15 seconds of a song is spawning homegrown stars with millions of fans
Skip Marley joins Perry in dangerously seductive theme park named "Oblivia"
Busta Rhymes' "Agent Orange" Trump diss, Beyoncé's 'Lemonade' statement of purpose and more
Perry's new single gets a live, primetime debut with Bob Marley's grandson Skip
Singer will debut track, featuring Bob Marley's grandson Skip, live at this week's Grammy Awards
How Madonna, Rihanna, Bruce Springsteen and hundreds more musicians are taking on the Trump agenda
"Is history repeating itself?" spot compares Trump's call for Muslim registry to Japanese internment camps
Amy Schumer, Chelsea Handler, Scarlett Johansson and more to participate in sister marches to send message that "women's rights are human rights"
Is latest 'America's Got Talent' winner the next Taylor Swift?
Twelve-year-old 'America's Got Talent' winner recently released debut EP 'Perfectly Imperfect'
"We need champions like Katy now more than ever: her passion, her energy and, yes, her voice, louder than a lion," Clinton says at surprise appearance
Pop star and comedian Joel McHale rock the vote – in the buff
Scottish singer also reveals album's hard-charging lead single, "Hurts"