Este, Danielle, and Alana Haim have the rare kind of sibling relationship where everything clicks, almost to a telepathic level (check out this video interview for proof). They started out banging out rhythms as toddlers and kept at it, eventually evolving into the sister band dubbed HAIM. It’s not hard to see where their influences come from, though. Their parents raised them on a steady diet of Fleetwood Mac and the Rolling Stones, and their early performance days were spent touring around L.A.’s local fairs as a family folk band called Rockinhaim.

When Rockinhaim disbanded, HAIM was formed in its place, minus Mama and Papa Haim. The all-girl band provides a much needed Janis Joplin-esque counterbalance to the candy-coated pop sounds that usually come to mind when you conjure images of girl groups on the rise in pop culture in 2013. After their Forever EP dropped in early 2012, they opened for worldwide acts including Rihanna, Beyoncé, Mumford and Sons, and Florence and The Machine, becoming staples on this summer’s music fest circuit. If you happened to spot them at Glastonbury, Governor’s Ball, Bonnaroo, or on Letterman in early June, it probably wasn’t easy to forget the band’s unique sound and Este’s nearly-as-famous-as-the-band “bass face” that frequently makes appearances during their quirky live performances.

Their debut LP Days Are Gone is promised to drop on September 27.  If their latest, “The Wire“ is anything to go by, we’re betting that the much-anticipated album will be what catapults these girls from opening act to headliner. However, just spending time in the studio to create a full album took more courage for the girls then anything else they’ve done so far. While most young acts can suffer from stage fright, HAIM admits to the opposite: studio fright. “We tried recording so many times and it just never sounded good until we released our first EP–that was the Forever EP,” Alana Haim (affectionately known as Baby Haim) told Life + Times. “To this day, we have studio anxiety. We can play 30 million shows, you can keep me on stage and I’ll play until my fingers bleed, but the second you put me in a studio—it’s really intimidating.”

Days Are Gone is available for pre-order on iTunes. Until it drops, catch them winning over crowds at Made In America.