Background: Ella Marija Lani Yelich-O'Connor (born 7 November 1996), known professionally as Lorde (pronounced lord), is a New Zealand singer, songwriter, and record producer who holds both New Zealand and Croatian citizenship. Born in the Auckland suburb of Takapuna and raised in neighbouring Devonport, she became interested in performing as a child. In her early teens, she signed with Universal Music Group and was later paired with songwriter and record producer Joel Little. At the age of sixteen, she released her first extended play, The Love Club EP (2012), reaching number two on the national record charts in both New Zealand and Australia. "
Context: In May 2009, Lorde and musician friend Louis McDonald won the Belmont Intermediate School annual talent show as a duo. On 13 August 2009, Lorde and McDonald were invited in for a chat on Jim Mora's Afternoons show on Radio New Zealand. There, they performed covers of Pixie Lott's "Mama Do (Uh Oh, Uh Oh)" and Kings of Leon's "Use Somebody". McDonald's father Ian sent both his home audio recording of her and Louis McDonald covering Duffy's song "Warwick Avenue" and his home video recording of the pair singing Pixie Lott's "Mama Do" to Universal Music Group (UMG)'s A&R Scott Maclachlan. In 2009 Maclachlan signed her to UMG for development. Lorde was also part of the Belmont Intermediate School band Extreme; the band placed third in the North Shore Battle of the Bands finals at the Bruce Mason Centre, Takapuna, Auckland on 18 November 2009.  In 2010 Lorde and McDonald performed covers live on a regular basis as a duet called "Ella & Louis", playing at The Leigh Sawmill Cafe on 15 August, at Roasted Addiqtion Cafe in Kingsland on 20 August, at The Vic Unplugged at Victoria Theatre, Devonport on 27 October, and at Devonstock in Devonport on 12 December. While working on her music career, she attended Takapuna Grammar School from 2010 to 2013, completing Year twelve. She later chose not to return in 2014 to finish Year thirteen.  In 2011, UMG hired vocal coach Frances Dickinson to give Lorde singing lessons twice a week for a year. During this time, she began writing songs and was set up with a succession of songwriters, but without success. At the age of fourteen, Lorde started reading short fiction and learned how to "put words together". She performed her own original songs publicly for the first time at The Vic Unplugged II on the Devonport Victoria Theatre main stage on 16 November 2011. In December 2011, MacLachlan paired Lorde with Joel Little, a songwriter, record producer, and former Goodnight Nurse lead singer. The pair recorded five songs for an EP at Little's Golden Age Studios in Morningside, Auckland, and finished within three weeks.
Question: What popular song was released by Lorde in 2009 ?

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