National Geographic Music (National Geographic)

WATCH FULL CONCERT HERE

As any music Latin fan can tell you, the most heated political debate of the summer wasn't about healthcare reform here in the U.S., but the controversial Paz Sin Fronteras II concernt organized and headlined by Colombian superstar Juanes, which took place this Sunday in Havana, Cuba.

The free concert offered a heavyweight roster of Latin musical talent, including Juanes, Miguel Bosé, Olga Tañón, Orishas, Silvio Rodríguez, Los Van, Van, Víctor Manuel, Cucu Diamantes & Yerba Buena, Jovanotti and more. The show attracted more than a million people to Havana's historic Plaza de la Revolución.

The concert was organized in the wake of last year's successful Paz Sin Fronteras event, staged to defuse mounting tensions between Venezuela and Colombia. This year's show was scheduled to coincide with the United Nations' "International Day of Peace" (September 20th, 2009), and performers and attendees were encouraged to dress all in white, to symbolize peace.

But not everyone went along with the program. Critics of the event, especially South Florida's anti-communist Cuban exile community, contended that the concert lent tacit support to Cuba's communist regime, and mounted a vocal campaign against it. And then things got really crazy... with Juanes recieving death threats via his Twitter account, and police guarding his Key Biscayne, FL home from potential attackers.

For his part, Juanes responed to his critics by meeting with Secretary of State Hillary Clinton about the possibility of circumventing the United States' cultural embargo to allow American artists to perform on the island. He also blasted back on his Twitter page, asking: "Why are the promotion of unity between peoples and the dismantling of borders bothersome?"

But despite all the crazy, the show went on yesterday without a hitch-so successfully, in fact, that some counts estimate that as many Cubans turned out for Juanes as for John Paul II's Papal visit in 1998.

But don't take our word for it. Click here to watch the Paz Sin Fronteras II concert in its entirety.