"Best Friend" is a song recorded by American rapper Saweetie. It was released on January 7, 2021 as the third single from her upcoming debut studio album, Pretty Bitch Music. The song features American singer and rapper Doja Cat, and was written by the two performers along with Asia Smith, Kaine, Theron Thomas, Dr. Luke and Rocco Did It Again!, with the latter two being its producers.
The song's first official remix features vocals from British rapper Stefflon Don, while the second features Chinese rapper VaVa. A third, with New Zealand rapper JessB and Australian singer Okenyo, a fourth, with South Korean singer Jamie and South Korean/Japanese rapper Chanmina, and fifth, with German rapper Katja Krasavice, were also released.