I had no idea that Rock in Rio was held in places other than, duh, Rio de Janeiro.
As for Green Day taking part... I hadn't heard anything about it. All I've found on the matter is this:
The third edition of Rock in Rio will be in Lisbon, Portugal, again and Arganda del Rey, Madrid, at the same time, and has been announced for 2008 and should take place between May 30-31 and June 1-5-6 in Lisbon, and between June 27-28 and July 4-5-6 in Madrid.
Confirmed artists at Rock In Rio LisbonMay 30Ivete Sangalo
James Morrison
Lenny Kravitz
Amy Winehouse
May 31Bon Jovi
Alanis Morissete
Skank
Alejandro Sanz
June 1John Stewart
Joss Stone
Tokio Hotel
Xutos & Pontapés
June 5Metallica
Machine Head
Apocalyptica
Moonspell
June 6Linkin Park
Kaiser Chiefs
Confirmed artists at Rock In Rio Madrid June 27Alanis Morissette
Jack Johnson
Manolo García
Neil Young
June 28Mando Diao
El Canto Del Loco
Tokio Hotel
Carlinhos Brown
July 4Shakira
Jamiroquai
Amy Winehouse
James Morrison
July 5The Police
Alejandro Sanz
Estopa
Ivete Sangalo
July 6Lenny Kravitz
Franz Ferdinand
Chris Cornell
Tiësto
And now, thanks to YOU, I know that there is supposed to be a Rock in Rio Buenos Aires next year.
So