Adam Noah Levine (; born March 18, 1979) is an American singer, songwriter and musician, who is the lead vocalist and rhythm guitarist of the pop rock band Maroon 5. Levine began his musical career in 1994 with the band Kara's Flowers, of which he was the lead vocalist and lead guitarist. After the commercial failure of their only album, The Fourth World, the group was reformed in 2001 as Maroon 5 – with James Valentine replacing Levine as lead guitarist. In 2002, they released their first album, Songs About Jane, which went multi-platinum in the US; since then, they have released six more albums: It Won't Be Soon Before Long (2007), Hands All Over (2010), Overexposed (2012), V (pronounced: "five") (2014), Red Pill Blues (2017), and Jordi (2021). As part of Maroon 5, Levine has received three Grammy Awards, three American Music Awards, an MTV Video Music Award, and a World Music Award.

From 2011 to 2019, Levine served as a coach on NBC's reality talent show The Voice. The winners of seasons (1, 5, and 9) belonged to his team. In 2012, Levine made his acting debut as recurring character Leo Morrison in the second season of the television series American Horror Story. Levine also appeared in the films Begin Again (2013), Popstar: Never Stop Never Stopping (2016), Fun Mom Dinner and The Clapper (both 2017). Levine launched his eponymous fragrance line in 2013. The same year, he collaborated with Kmart and ShopYourWay.com to develop his menswear collection. He also owns a record label, 222 Records, and a production company, 222 Productions, which produced television shows Sugar and Songland. In 2013, The Hollywood Reporter reported that "sources familiar with his many business dealings" estimated Levine would earn more than $35 million that year.