MC Lars

Having his own label allowed Lars to experiment creatively. Lars Attacks! was a return to basics, with less punk elements and more standard hip-hop stylings, funded by Kickstarter, featuring cameos from KRS-One, Sage Francis and Mac Lethal. MC Lars used Kickstarter to fund a "Greatest Hits" album on vinyl, which also included his "Edgar Allan Poe EP". On November 6, 2015, Lars released the Zombie Dinosaur LP, his fourth official album. The name Horris Records is derived from a cartoon character Lars created in middle school which also served as the basis for Lars' original stage name, MC Lars Horris, named after a character from Dr. Quinn Medicine Woman.

On stage, Lars has been joined by Wheatus, Bowling for Soup, Simple Plan, the Matches and Failsafe. While supporting Zebrahead in the UK and Europe in 2010, Ed Udhus, Greg Bergdorf and tour manager Bobby Conner joined Lars on stage. In 2019 MC Lars took to the stage with Newcastle-based unsigned alt rock outfit, Ruled By Raptors, as his backing band in the UK as part of his 10-year anniversary celebrations for This Gigantic Robot Kills. On the tour, MC Lars mentioned this was the first time that he had performed with a band without any form of backing track, instead relying on the band to recreate everything instrumentally or with samples and triggers.

In 2008 and 2009, Lars worked with "Weird Al" Yankovic, Wheatus, the Rondo Brothers, Nick Rowe and Mike Kennedy of Bloodsimple, Daniel Dart of Time Again, Pierre Bouvier of Simple Plan, MC Bat Commander of the Aquabats, Suburban Legends, Worm Quartet, Gabriel Saporta of Cobra Starship, Brett Anderson of the Donnas, MC Frontalot, Jesse Dangerously, Jaret Reddick of Bowling for Soup, Adil Omar, Linus Dotson of Size 14, Parry Gripp of Nerf Herder, Jonathan Coulton, Aesias Finale, Sebastian Reynolds, Joe Ragosta of Patent Pending and classical musician Walt Ribeiro to complete his album This Gigantic Robot Kills.

In April 2007, MC Lars and Nettwerk made the component tracks for his single "White Kids Aren't Hyphy" available for remix under a by-nc-sa Creative Commons license on the Jamglue online mixing site as a contest. In May, MC Lars toured the UK on the third installment of the Good To Go Tour, making friends with Wheatus front man Brendan B. Brown. In July Lars and Brown recorded new songs, two of which would later appear on This Gigantic Robot Kills. In November, Lars returned to the UK on tour with pop-punk band Last Letter Read who performed their own set and then on stage with Lars, debuting Lars' new song "Hey There Ophelia".

In 2006, he released the single "Download This Song", which entered the Australian Singles Chart at number 29.

In 2006, Lars worked with the Canadian independent record label Nettwerk Records to release The Graduate. Following this release, Lars toured extensively throughout the US, then he toured UK and did shows in Japan, and Australia. Not long after the album was released on iTunes, Lars received an e-mail from a 15-year-old fan Elisa Greubel on his web forum saying she identified with "Download This Song" since her family was one of many being sued by the Recording Industry Association of America. This led to Nettwerk executive Terry McBride and a team of major-label artists managed by Nettwerk to support the Greubels with their case. MC Lars returned to the UK in October 2006.

He has recorded for Truck Records in the UK, Sidecho Records in the United States, Big Mouth Records in Japan, and Shock Records in Australia. He was formerly known as MC Lars Horris but changed his pseudonym to MC Lars in 2004 for purposes of simplicity.

Following 2004's the Laptop EP, Lars continued to grow his independent record label Horris Records. Horris served as an imprint of Nettwerk and Oglio before becoming self-distributed. In 2008, Horris signed a two-record distribution deal with Crappy Records, founded by Jaret Reddick, from the American rock band Bowling For Soup. In 2011, Horris signed Weerd Science.

He is the founder and CEO of the independent record label Horris Records. He is one of several people who claim to have coined the term iGeneration, which he is credited with doing in 2003.

The term "iGeneration", coined by Lars in 2003, was used to describe the generation born primarily in the mid-to-late 1980s, was used in his song of the same name and given out for free to Facebook users in August 2006 in conjunction with iTunes. In early 2006, his song "Download This Song" was featured on the pop-culture CBC Radio show Definitely Not The Opera.

Andrew Robert Nielsen (born October 6, 1982), known professionally as MC Lars, is an American rapper, producer, cartoonist and podcaster. He is one of the self-proclaimed originators of "lit-hop" and was one of the first rappers to sample and reference post-punk, pop punk, and emo bands.