Nina Elizabeth Agzarian was born on 18 December 1984 in Wagga Wagga, the second daughter to an Armenian-Egyptian father, Michael (Graphic Designer and Advertiser of Advision (Surry Hills, Australia)) and Australian mother, Janine née Bishop (a teacher at St Joseph's Primary School). At eighteen, she moved to Sydney to commence university, where she started working in radio production. In 2004 she began an internship at national youth radio broadcaster, Triple J, where she adopted the stage name of Nina Las Vegas.
In 2007 Agzarian, Andrew Levins (a Sydney DJ) and Diplo (an American DJ, music producer, and songwriter) established Heaps Decent as a non-profit organisation which supports emerging underprivileged and indigenous musicians. Heaps Decent offers ongoing music programs at schools, juvenile justice centres and youth drop-in centres in New South Wales.
From 2009 to 2014 Agzarian was the host of House Party on Triple J. On 3 August 2012 Triple J released a double CD, House Party Volume 1, where she mixed the tracks for various artists.The album peaked at number 2 on the ARIA Compilation Albums chart, and was certified gold by ARIA. On 2 August 2013 Triple J issued a follow-up compilation album, House Party Volume 2, again with Agzarian mixing for various artists, which reached number 1 on the Australian iTunes chart and was also certified Gold. Both compilation albums made the ARIA top 25 dance albums of the year for the respective year of their release. During this time she curated and toured with acts such as Flume, Beni, What So Not, Flight Facilities, Wave Racer andTyler Touché across the country as part of the Triple J House Party National Tour. She performed at Stereosonic and Splendour in the Grass in 2014, which attracted some criticism as she was a DJ and not a musician.She selected the soundtrack for the Sydney New Year's Eve fireworks to bring in 2015.
In 2014 Agzarian released her first official EP, Don't Send, with Melbourne producer Swick on, American DJ and music producer, Skrillex's online label, Nest HQ. It was a two track release, "Don't Send" and "Flash Auto".
In 2015 Agzarian announced her tour of the United States including performances at South by Southwest and the Winter Music Conference. As of February 2015 Agzarian produces and presents Mix Up Exclusives on Triple J, on Saturdays from 9 to 10 p.m.Agazarian has since resigned from Triple J to pursue her record label 'NLV Records' and solo career.