Brittany Alexandria Sheets, known by her stage name Mars Argo, is an American singer, songwriter, and internet personality.

Sheets is prominently known for her portrayal of a fictionalized stage persona of herself on YouTube. She became known as the lead singer of the indie rock band of the same name, named after her main stage persona. Mars Argo (the band) released their only album, Technology Is a Dead Bird, on November 6, 2009. The band continued to release extended plays such as Internet Sessions and Linden Place throughout 2010 and 2011. In a 2013 Vice article, the band stated that they were working on their own TV show along with a second album, but both projects were later abandoned.

Besides releasing music, Sheets co-produced, wrote, and directed content for her YouTube channel grocerybagdottv (renamed shouldicleanmyroom in 2022), formerly co-operated by her former partner Titanic Sinclair. The channel's content was often satirical, revolving around society and Internet culture. However, after the duo separated in early 2014, all but three videos (the music videos for "Using You", "Runaway Runaway", and a satirical video called "Delete Your Facebook") were removed from the channel.

In 2022, Sheets released her debut solo single "Angry", and a subsequent audio video was uploaded onto the channel. On March 15, 2023, she released another single titled "I Can Only Be Me".