After more than a week of Lollapalooza headliner teases in CTA and online advertisements, a memo that allegedly reveals the entire Lollapalooza 2012 lineup has surfaced.

More than a dozen likely headliners were revealed in ads featuring song lyrics and the "#lolla" in recent weeks, but some of the biggest acts have apparently been saved for last.

Since Thursday, lyrics from Sigur Ros, the Black Keys, Santigold, Kimbra and Twin Shadow have all been featured in the #lolla ads. Last week's ads include Jack White, Justice, The Weeknd, Bloc Party and more. All of those bands appeared on the leaked memo, along with Black Sabbath, the Red Hot Chili Peppers, Florence and the Machine, At the Drive In and more.

We rounded up some of the biggest names below, but see the full memo here.

The full Lollapalooza 2012 festival lineup is slated to be announced Wednesday.

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