The Roots are an American hip hop/neo soul band, formed in 1987 by Tariq "Black Thought" Trotter and Ahmir "Questlove" Thompson in Philadelphia, Pennsylvania, United States. The Roots are known for a jazzy and eclectic approach to hip-hop featuring live musical instruments.Malik B., Leonard "Hub" Hubbard, and Josh Abrams were added to the band (formerly named "The Square Roots"). Since its first independent album-length release the band has released 10 studio albums, two EPs, two collaboration albums (with other artists), and also collaborated on recordings and in live shows with a wide variety of artists in many musical genres. The Roots served as the house band on NBC's Late Night with Jimmy Fallon from 2009 to 2014, and in the same role (and accompanying show guest artists) on The Tonight Show Starring Jimmy Fallon since 2014. The Roots' work has been consistently met with critical acclaim. About.com ranked the band #7 on its list of the 25 Best Hip-Hop Groups of All-Time, calling them "Hip-hop's first legitimate band."