A long line of music acts from John Legend to Neil Young have popped up as guests on The Colbert Report–and the latest is Canadian rock legend Rush. The band, which hasn't appeared on American TV since 1975, will likely share sexual fantasies involving Ayn Rand tonight with Stephen Colbert before performing their 1981 hit, "Tom Sawyer." Check your local listings. And remember: If you choose not to decide to watch this show, you still have made a choice.