This 1995 double album was a sprawling marriage of alt-kvetching and prog-stargazing – a laser show in a shrink's office. Its audacious scope and emotional wallop allowed seemingly disparate tracks like the delicate miniature "Thirty-Three" and the thrashing "X.Y.U." to seem like natural parts of a whole. The extras on the deluxe box set, particularly the deep-dive instrumentals that flaunt Billy Corgan's guitar prowess ("Fun Time") and cutting-room-floor denizens that reveal pop punch (the sweet, wistful "Pennies"), show how Corgan's mid-Nineties creative peak couldn't even be contained by two CDs.

“Youth Knows No Pain”

“Like on 'Youth Knows No Pain' — we are the ones that should demonstrate, because we can take it,” Likke Li said. “We can pierce ourselves, take Ecstasy, dance all night and still go to work at our McDonald's jobs.” Despite the hedonistic sentiment in the song, the Swedish singer also admitted in hindsight her youth had repercussions. “I remember when I was 18-19 and feeling that I know it all,” Li said. “I always feel that I know it all. But that song is about realizing you don’t, and reflecting, ‘Boy, if I only knew what would follow.’”