initial lack of airplay on major radio stations, the song reached number 1 in the week ending 15 August, becoming the first single by either artist to do so and their most successful single. Until 2014, the song was one of the two-second-longest-running Australian number-one songs, with eight weeks at the top, tied with Savage Garden's 1997 song "Truly Madly Deeply", and behind Daddy Cool's 1971 hit "Eagle Rock", which stayed there for ten weeks. In August 2011, the song was released in Belgium and the Netherlands. After a few weeks in the charts, it reached number 1 in both countries, topping the Belgian Singles Chart for 12 weeks. Also in August, "Somebody That I Used to Know" debuted at number 4 in New Zealand on the RIANZ Singles Chart, reaching number 1 three weeks later, thus making Gotye the first Australian artist to reach number 1 since Guy Sebastian did so in February 2011 with "Who's That Girl". The song debuted on the Irish Singles Chart on 13 January 2012 at number 47, later reaching number 1 position. In the United Kingdom, "Somebody That I Used to Know" spent five non-consecutive weeks at number 1. In the United States, it debuted at number 91 on the Billboard Hot 100 on 14 January 2012. In its fifteenth week on the chart – after it was performed by Matt Bomer and Darren Criss on Glee on 10 April; by Phillip Phillips and Elise Testone on the eleventh season of American Idol before more than 16 million viewers on 11 April; and by Gotye and Kimbra on Saturday Night Live on 14 April – the song rose to number 1, where it stayed for eight consecutive weeks. thus becoming the longest-running number 1 by a solo male artist since Flo Rida's "Low" led for ten weeks in 2008. The song had the fourth highest-selling single week ever with 542,000 digital downloads sold, and was the first Australian single to top the Hot 100 since Savage Garden's "I Knew I Loved You" in 2000. The song also topped the Alternative Songs chart for twelve weeks tying with Fuel's Hemorrhage (In My Hands) and Linkin Park's Numb and New Divide, as well as topping the Radio Songs, Digital Songs, On-Demand Songs, Pop Songs, Adult Pop Songs, Adult Contemporary, and Hot Dance Club Songs charts in that country. On 2 May 2012 the song became