This is what we found on Wikipedia regarding the Jammin Festival:

Heineken Jammin' Festival is a large live rock festival in Milan, Italy featuring international and Italian rock acts.

It started in mid-June 1998 at the Imola Autodrome and has attracted attendances of more than 100,000 over the course of the three-day event. For the tenth anniversary of the festival in 2007, the location changed to Venice, Parco San Giuliano.

Some of the featured acts have included Vasco Rossi, Depeche Mode, R.E.M., Robbie Williams, Thirty Seconds to Mars, Lacuna Coil, Red Hot Chili Peppers, Garbage, Bon Jovi, Metallica, Iron Maiden, Marilyn Manson, Santana, Oasis, Green Day, Pixies, Lenny Kravitz, The Cure, and Chemical Brothers.