For those of you who have a hard time understanding exactly what falls under the category of "irony," this would be first on the list. They've built a wall around a U2 concert in Berlin that is being held to celebrate the 20th anniversary of the fall of the Berlin Wall.

The Irish band is only performing four songs, one of which will appear on MTV's European Music Awards tonight. 10,000 tickets were distributed for the show on the Internet. They were gone in three hours, but fans who didn't have tickets showed up anyway, hoping to catch a glimpse of the free concert. They were greeted by a 12-foot metal fence draped with a white tarp to block the stage from the street.

"It's completely ridiculous that they are blocking the view," said Louis-Pierre Boily, who came to Berlin from Quebec. "I thought it's a free show, but MTV probably wants people to watch it on TV to get their ratings up."

MTV said it worked with the local promoter, the city and Berlin police to install a temporary fence "around the site to ensure the safety and security of the attendees at the event as well as residents and businesses in the area."

Some of the hundreds of fans stuck behind the fence near the iconic Brandenburg Gate have tried to tear off the tarp.

The Berlin Wall that separated the communist East from the democratic West, and served as a symbol of Cold War tensions, fell on November 9, 1989.