"Boom Boom Pow" is a single by the Black Eyed Peas released as the lead single from their fifth studio album, The E.N.D. The song uses the auto-tune vocal effect, and blends the genres of dance pop, electro-hop and hip hop. "Boom Boom Pow" topped the Billboard Hot 100, making it the group's first U.S. number-one single. It is the second longest-running single to stay atop the Hot 100 in 2009, beaten only by the Black Eyed Peas' second single from The E.N.D., I Gotta Feeling, which held the top spot for 14 consecutive weeks. It has also topped the Australian, Canadian and UK singles charts as well as reaching the top 10 in more than 20 countries. The song was named 7th on the Billboard Hot 100 Songs of the Decade. The song sold over 4,295,000 digital downloads in the U.S, becoming the group's highest-selling song in the U.S. to date. It reached this threshold in just 23 weeks, faster than any other song in digital history. The old record was set by "Low" by Flo Rida, which topped the 4 million mark in its 35th week of release.