U2 kicked off a world tour in Barcelona this week, and even paid tribute to Michael Jackson by dedicating 'Angel of Harlem' to the late singer, weaving in pieces of Jackson's 'Man in the Mirror' and 'Don't Stop 'Til You Get Enough' toward the end of the performance.

But before U2 embarked on their current trek, dubbed the 360° Tour, they played a short string of intimate U.S. gigs in March. One of these performances was at the historic Somerville Theatre just outside of Boston, which houses less than 900 people in its audience. Check out an exclusive video from that evening of the band rocking out to 'Get On Your Boots,' the lead single from 2009's 'No Line On the Horizon.'

U2 Tour Dates
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