Chart and sales performance
Give the name of the longest-running number one single in New Zealand since Smashproof's hit single "Brother".
Party Rock Anthem
The song reached number one on the "Billboard" Hot 100, becoming the duo's first number one hit in the US, and remained there for six straight weeks. The song spent 68 weeks on the chart, becoming the third most total weeks on Billboard Hot 100 history. It topped the 7 million downloads mark in the United States in July 2012, becoming the second fastest song in digital history to reach this plateau (in 68 weeks) just behind Adele's "Rolling in the Deep" which achieved it in 67 weeks, and the third-biggest selling digital single since Nielsen SoundScan began tracking digital sales in 2003. It has also sold 7,695,000 copies in the US as of May 2013, and over one million copies in the UK. The song spent eleven weeks at number one in New Zealand and ten weeks in Australia. It is the longest-running number one single in New Zealand since Smashproof's hit single "Brother" in 2009, selling over 45,000 copies there, whereas in Australia, it is the longest-running number-one single since "I Wish I Was a Punk Rocker (With Flowers in My Hair)" by Sandi Thom in 2006 and the best-selling single of 2011. Certified thirteen-times platinum, it is the second biggest-selling single of all time in Australia, behind only Elton John's "Candle in the Wind 1997".