Roar, the lead single from Prism became Perry's 10th No. 1 Top 40 track after debuting at No. 1 on iTunes in 68 countries with 557,024 downloads in its first week of release, the biggest digital song sales week of 2013. Perry set the record at Top 40 for most total weeks (46) at No. 1 in the Billboard airplay chart's archives with Dark Horse, and Mediabase has just recognized the song as No. 1 Most Played, in addition to awarding her the title of No. 1 Artist across three radio formats -- Top 40, Hot AC and AC. She is the first artist to surpass the 75 million digital award threshold, counting digital downloads and on-demand streams -- 20 million ahead of any other artist. She is currently touring the world on the Prismatic World Tour, which continues to be a hugely successful global spectacle, with 17 sold out arenas in the UK, 66 sold out arenas in North America and 25 sold out arenas in Australia/New Zealand during this year. The tour continues in 2015 throughout Europe, Asia and South America where Perry will headline Rock In Rio in Brazil on September 25.