Which of these bands was a headliner at the Woodstock in 1969?

Jefferson Airplane actually were headliners at the Woodstock festival in 1969. The festival has become widely regarded as a pivotal moment in popular music history as well as a defining event for the counterculture generation.

The Jeff Beck Group disbanded prior to Woodstock. "I deliberately broke the group up before Woodstock," Beck said. "I didn't want it to be preserved." Beck's piano player Nicky Hopkins performed with Jefferson Airplane.

The Doors were considered but canceled at the last moment. According to guitarist Robby Krieger, they turned it down because they thought that it would be a "second class repeat of Monterey Pop Festival" and later regretted that decision.

Led Zeppelin were asked to perform. Their manager Peter Grant stated: "I said no because at Woodstock we'd have just been another band on the bill."