Sudan Ameer Williams, better known by his stage name Iamsu!, is an American rapper and record producer from Richmond, California. He is the co-founder and lead member of the hip-hop group HBK Gang, which was formed in 2008 and joined by fellow Bay Area artists including Kehlani and Sage the Gemini. He is best known for his guest appearances on Sage the Gemini's 2013 single "Gas Pedal" and LoveRance's 2011 single "Up!," both of which peaked within the top 50 of the Billboard Hot 100. He signed with Alternative Distribution Alliance to release his debut studio album Sincerely Yours (2014), which moderately entered the Billboard 200 and received mixed reviews.