“The both of us have gone through so much crazy shit these last three years.” momma.band’s new album, Welcome To My Blue Sky, out on April 4, is a document of metamorphosis and their lessons learned through growing pains, a love letter to getting older and the relationships that actually last, soundtracked by grunged-out guitars, hooky pop melodies, and a whole lot of distortion. Songs like “Rodeo” and “I Want You (Fever)” nod to life-altering romantic upheaval and its ensuing chaos, but it’s Etta Friedman and Allegra Weingarten’s friendship that serves as the core for the record — and the band. “Our relationship is one of the most important things in my life,” Friedman says. The record’s title, Welcome To My Blue Sky, is taken from a gas station sign — “you know, those ones with the changing letters” — that Weingarten spotted while on tour with Weezer. There is something infinite about the endlessness of a blue sky in its most obvious terms, but for the band, the message felt like a...