Charli XCX

Straddling the experimental and mainstream sides of pop with ease, Charli xcx is as comfortable working with cutting-edge producers like A.G. Cook as she is touring with Taylor Swift. As a songwriter and collaborator, she helped create some of the biggest pop singles of the 2010s, including Icona Pop's 2012 smash "I Love It" and Iggy Azalea's 2014 chart-topper "Fancy." As an artist in her own right, her work spanned the edgy sounds of her 2013 debut album, True Romance, to the more straightforward territory of 2014's follow-up Sucker and its U.S. Top Ten single "Boom Clap." As...