Tina and Amy. Oprah and Gayle. Abbi and Ilana. You can add Hana and JJ to that list. When the best friend duo that makes up Overcoats met in college, their connection was as harmonious as their sound: folksy yet electronic and set against a soulful backdrop. The pair transitions from soft and clear opening notes to a high-energy dance party, but what is consistent across their debut album, Young, is the vulnerability in their lilting harmonies. And, much like their friendship, it’s almost impossible to separate one voice from the other. See your newest friend crushes when Overcoats plays Brighton Music Hall on Oct. 19. / Brenna Donovan