Lead-off single "Now", with lyrics like, "if there's a future, we want it now," sets the urgent tone of Paramore, the Nashville, Tennessee-bred band's fourth album. The band members holed up to write over the past year and a half and emerged with a collection of songs that retains Paramore's youthful spirit, but clearly shows their evolution. It's the most musically adventurous set they've released to date. Which isn't to say the album won't thrill longtime fans. Still present is a ferocious, churning energy (a hallmark of Paramore's sound) on "Now," "Fast In My Car," "Proof," "Anklebiters," and "Be Alone." But the album should also earn Paramore new listeners, thanks to the trio's willingness to explore uncharted sonic territory, like the funky, high-stepping "Ain't It Fun" (featuring soulful vocals from Williams, slap-bass from Davis, and the soaring sound of a gospel choir), the doo wop-inflected "(One of Those) Crazy Girls," and the lilting, string-filled "Hate To See Your Heart Break." "People obviously give Hayley credit for being an amazing singer, but I don't think they really understand how versatile she is and how much her voice can do," York says. "You really hear different sides of her on this album."