U2 kicked off their South American tour – featuring opening act Muse – on Friday night at Chile's National Stadium. The biggest surprise of the set was the Joshua Tree deep cut "One Tree Hill," which is rarely played outside of New Zealand. "This is a song we only play on extremely special occasions," Bono told the crowd. "A song about the love of life and the fear of losing it."
Chilean singer/songwriter Francisca Valenzuela joined the group halfway through to duet on the track, which coincidentally came out about a week before she was born. The South American leg of U2's 360 tour wraps on April 13th in Sao Paulo, Brazil. The North American leg begins a month later on May 13th in Mexico City and runs through July 30th in Moncton, New Brunswick.