The voice behind the catchy hook to Iggy Azalea’s 2014 hit “Fancy,” Charli XCX is not new to the music scene. Born Charlotte Emma Aitchison, the UK native has been active in music since 2005. After releasing singles sporadically since her debut, the singer finally released her first major studio LP, titled True Romance, in April 2013. She officially blew up, however, when featured on the smash hits “I Love It” by Icona Pop and “Fancy” by Iggy Azalea. She scored her first solo top 10 Billboard hit with her single “Boom Clap” in 2014. (Photo: Frazer Harrison/Getty Images)