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The way this thing has gone back and forth, yay and nay, is enough to give you Rock and Roll whiplash. But a tweet from Adam Lambert, along with some good words from Brian May, says it’s a done deal.

And the location is very special for Queen, invoking memories of former lead singer, Freddie Mercury.

Here’s the proof from Adam’s Twitter page:

As many suspected, I can finally confirm: I have been invited by Queen to sing one very special concert! Sonisphere at Knebworth July 7th! Sorry to be coy about the details the past few weeks, but I made a promise to keep it under wraps as best I could. Gonna be a surreal night!

The former American Idol finalist will be joining Queen on July 7th, as they headline the second day of the Sonisphere Festival. Here’s the really cool part: This performance will take place at Knebworth Park in Stevenage, England, the same place where Queen played their final show with Freddie in 1986.

Queen guitarist, Brian May, added to the excitement: “Judging by my incoming mail, this decision will make a lot of people very happy. It’s a worthy challenge for us, and I’m sure Adam would meet with Freddie’s approval! And what better place to revisit, and walk those emotional paths than Knebworth? It will be a rush.”