Hailing from Sacramento, MarMar Oso is an R&B singer whose music runs the gamut of human expression, delving deep into feelings of love and intense emotion. The 21-year-old stepped onto the scene with his debut single, "Lost Feelings," a cautionary tale of heartbreak and tragedy. After garnering thousands of views, MarMar Oso dropped off his critically-acclaimed Mixed Emotions mixtape, which was well-received by listeners alike. In late 2018, MarMar Oso caught the ears of many with his viral triumph, "Ruthless.