Although Katy Perry is best-known for frothy, off-the-walls pop music, the Billboard Hot 100 topper opened her Thursday (Jan. 30) night mini-set during the FireAid LA Benefit Concert with a very different type of energy.

Katy Perry has something to say about Carrie Underwood replacing her as a judge on American Idol.

Rod Stewart, Katy Perry and Lady Gaga were just some of the famous faces who performed at FireAid on Thursday, a benefit concert raising money for those affected by the devastating Los Angeles wildfires.

Follow live updates on the FireAid benefit concert, which will feature performances from Billie Eilish, Lady Gaga and more, as they raise money for Los Angeles-area wildfire victims.

The two-venue FireAid Benefit Concert was held in Los Angeles on Thursday night to help raise money for the Southern California communities affected by the devastating fires that ignited earlier this month.

Billie Eilish, Pink, Katy Perry, Nirvana and Dr Dre were among the stars who performed at FireAid on Thursday, a benefit concert in Los Angeles to help the area recover from two of the largest fires in its history.

Kate Middleton visits a children's hospice in Wales, plus JC Chasez and Lance Bass, Katy Perry, Hailey Bieber and more. From New York to Hollywood and everywhere in between, see what your favorite stars are up to.

From must-see concerts to upcoming music releases and more, we’re breaking down the hottest music news and events happening from Los Angeles to New York.

Katy Perry, who just announced the U.S. leg of her upcoming Lifetimes Tour, exclusively told E! News how she and fiancé Orlando Bloom show up for each other amid their busy schedules.

Bruno Mars and Rose's “Apt.” earns the singer his eleventh leader on Billboard's Digital Song Sales chart, matching Katy Perry's historic record.