"Up" is a hip hop song by American rapper Cardi B. It was released through Atlantic Records as the second single from her upcoming second studio album on February 5, 2021. "Up" was written by Cardi B alongside Jordan Thorpe, Joshua Baker, and its producers DJ SwanQo, Yung Dza and Sean Island. The song debuted at number two on the US Billboard Hot 100 chart, marking the highest debut for a solo female rap song since Lauryn Hill's "Doo Wop (That Thing)" in 1998.