Bobby Wardell Sandimanie II (born July 8, 1975), better known by his stage name I-20, is an American rapper. He is best known for his very deep voice and his affiliation with fellow Georgia rapper Ludacris, most notably guest appearing on his 2002 single, "Move Bitch" alongside Mystikal. The song peaked at number ten on the Billboard Hot 100, and followed after his signing to Ludacris' Disturbing tha Peace label and guest performances on his first two albums: Incognegro (1999) and Back for the First Time (2000). I-20 was also heavily featured on the label's compilation albums Golden Grain (2002) and Ludacris Presents: Disturbing tha Peace (2005), as well as many of Ludacris' subsequent releases. In 2004, I-20 released his debut album, Self Explanatory through the label in a joint venture with Capitol Records; it peaked at number 42 on the Billboard 200 and number five on the Top R&B/Hip-Hop Albums.

His original stage name was Infamous 2-0, but was later changed to tribute the namesake interstate route which runs through the Southeastern United States. Since then, he has heavily worked with producer DJ Pain 1. He is managed by Mark "ShaH" Evans.