"Hit 'Em Up Style (Oops!)" is the debut single of American R&B singer Blu Cantrell, written and produced by Dallas Austin and featured on Cantrell's debut album, So Blu (2001). The song was released in the United States on April 23, 2001, and was issued in other regions later that year. It is Cantrell's most successful single in the US and her only single to enter the top 40 of the Billboard Hot 100, peaking at number two (where it spent two consecutive weeks) on the issue date of July 21, 2001. It enjoyed similar success in Europe and Oceania.