British heavy metal legends IRON MAIDEN this week landed at position No. 1 on Billboard.com 's "Hot Tours" list of top-grossing tours with $19 million in ticket sales from 14 performances in 13 cities on their summer tour of Europe. The shows were attended by a total of 259,298 fans, including a sellout crowd of 55,531 at a football stadium, Friends Arena, in the Stockholm suburb of Solna, Sweden. Also included was a sold-out concert on May 29 at Lisbon, Portugal's Pavilhão Atlântico. IRON MAIDEN's August 3 show at London, England's O2 Arena (with a capacity of up to 20,000, depending on the event) sold out in just 12 minutes, so a second show was added on Sunday, August 4. This will definitely be the band's last U.K. show this year as soon after they head off for a few selected USA shows before a massive trip around Latin America, including headlining Rock In Rio and national stadiums in Mexico, Chile and Argentina.