In between shooting movies and working on her anticipated Brat follow-up, Charli XCX invested in the British audio brand and stars in its latest campaign If you purchase an independently reviewed product or service through a link on our website, Rolling Stone may receive an affiliate commission. Nothing has made a name for itself as an under-the-radar tech brand, but it doesn’t look like it will stay under the radar much longer. The London-based company announced that Charli XCX will be its first global ambassador, with the singer appearing in a campaign highlighting its headphones .  In addition to joining Nothing as an ambassador, Charli XCX also signed up as a shareholder, indicating that this partnership isn’t just a one-and-done photoshoot. In a statement, Charli wrote, “When I’m creating, I’m always thinking about how my work will be experienced out in the world and I love how Nothing headphones sound and are designed.…