"Sum Bout U" is a song by American rapper 645AR featuring English singer-songwriter FKA Twigs, released on August 4, 2020, by Columbia Records.

The song was written alongside producer SenseiATL and co-producer El Guincho, and came with a music video directed by Aidan Zamiri.

[3] Pitchfork's Alphonse Pierre notes that while the two artists seem very different, Twigs' distinct falsetto and 645AR's signature squeaky rap style are surprisingly similar.

[5][6] The video concept was conceived by Twigs and its release coincided with her launching a charitable fundraiser for sex workers.

[6] Twigs' look in the video was frequently noted for involving very thin eyebrows, part of an ongoing fashion trend that had been revived around the time after having been popular in the late 1990s and early 2000s.