The Jonas Brothers' new album drops on June 15, and the boys say that it will "add and build to the sound we already have." Band leader and youngest brother Nick Jonas says that the songs on the new album are "our journal in songs" and about "things we've gone through, personal experiences we get inspiration from," Billboard.com reports. "This album is taking steps," Nick notes. "We're trying to learn as much as we can, continuing to grow." The as-yet-untitled follow-up to their #1 album A Little Bit Longer also pays homage to Elvis Costello, Kings of Leon and Neil Diamond, according to