Marina + the Diamonds -- the stage name for solo songstress Marina Diamandis -- is about to break even bigger in America than she has already, courtesy of her new tour and its accompanying documentary 'Heartcore.'

In a preview set to the track that will likely be her breakout hit stateside, 'How to Be a Heartbreaker,' a camera follows Diamandis on the road. We see her not only onstage, but also interacting with fans, goofing off in the car and at rest stops and just being herself.

Entertainment Weekly reports that Diamandis is embarking on her Lonely Hearts Club tour in the U.S. this spring, and she'll likely be bolstered by none other than the show 'Glee' -- on the March 14 episode, Lea Michele will croon 'How to Be a Heartbreaker.'

These will all factor in, as well as Diamandis' viral cover of Justin Bieber's 'Boyfriend' and tours with Coldplay and Katy Perry, into making the heart-printed Welsh cutie a global star.