Jenn and Karen break down Led Zeppelin's magic formula: It's not just the band members—it's the invisible air that connects them when they're in sync. It's not the guitar, the drums, or the vocals alone, but the beautifully weird chemistry swirling in the space between them. (There's probably some rock-n-roll pixie dust involved too, but we won't spill all the secrets here.) Just like well performing teams, it is the entity not the individuals that make all the difference.