Mario Dewar Barrett (born August 27, 1986), known mononymously as Mario, is an American singer, songwriter, actor, dancer, and model. Born and raised in Baltimore, Maryland, he signed a record deal with J Records at age fourteen, and recorded his eponymous debut album released in 2002. It includes the top 10 single, "Just a Friend". His second album Turning Point, was released in 2004, and produced the number one single "Let Me Love You", which won him two Billboard Music Awards. His third studio album Go was released in December 2007, and included the singles "How Do I Breathe", "Crying Out for Me" and "Music for Love". His fourth studio album D.N.A. was released in 2009, and included the singles "Break Up" (featuring Gucci Mane and Sean Garrett) and "Thinkin' About You". At the end of the 2000s decade, Mario was ranked No. 98 by Billboard on their "Artist of the Decade" list. His fifth album Dancing Shadows, released in 2018, saw him in a more introspective sound than previous albums.
Aside from his career in music, he appeared in several television shows and films such as Step Up (2006), Freedom Writers (2007) and Empire (2018–2020). In 2019, Mario starred in the live television production of the musical Rent.