Charli XCX has written and guested on two of the biggest singles of the past two years—Icona Pop’s ‘I Love It’ and Iggy Azalea’s ‘Fancy’—and opened for Ellie Goulding and Paramore on tour. Now she’s headed for superstardom as an artist in her own right.<br /><br />U.K.-born Charli’s brand of pop intertwines mainstream and underground sounds, and she’s constantly pushing her sound in different directions. After a music career that began in 2007 at age 14 with a self-recorded album (aptly named ‘14’), her major label studio debut, ‘True Romance,’ came out in April 2013.<br /><br />Her new single ‘Boom Clap’, featured on the soundtrack of ‘The Fault in Our Stars,’ ‘is a magical song to me,’ she says. ‘It celebrates epic love. I want people to dance and cry to it, and scream it at the top of their lungs.’ The track drops 7 July, and a second studio album, which she describes as ‘very sexy, spectral record in a very classy, masculine way,’ is in the works.