In February 2011, it was announced that her arena tour of the year, "Hotel Love Songs", would start in April. Shortly after the 2011 Tohoku earthquake and tsunami hit, it was announced that the tour was rescheduled to start in late May and the tour was renamed to "Power of Music". Deeply affected by the Tohoku earthquake and tsunami devastation, Hamasaki decided to collaborate with fashion magazine, "Vivi", with the sale of charity shirts and the profits going to help the victims in the devastation. On April 20, 2011, Hamasaki simultaneously released four new remix albums, "Ayu-mi-x 7":"House", "Acoustic Orchestra", "Trance 4", "Ayu-ro Mix 4", and a "Limited Complete Box Set", which were also released internationally on iTunes. On that same day, Hamasaki also released ' and ' which topped the weekly chart at No. 1 and No. 2 respectively. The simultaneous releases made Hamasaki the first artist ever to have 4 albums in Oricon's top 10 and also the first artist to hold 2 top positions in the Oricon DVD chart. Their original release date of March 30 was postponed due to the 2011 Tohoku earthquake and tsunami and was pushed back to April 20 instead. On April 21, 2011, it was announced that she would perform in a-nation 10th Anniversary for Life Charge &amp; Go! On May 4, it was announced that she broke another record – the female artist with the highest DVD sales with 2,313,000.