"B.F.A. (Best Friend's Ass)" is a song by Belgian production duo Dimitri Vegas & Like Mike featuring American media personality Paris Hilton. It was released on 10 May 2019 through Smash the House. Hilton raps on the song.
Kim Kardashian stars in the music video, which also features drag queen and Britney Spears impersonator, Derrick Barry and transgender influencer Nikita Dragun. Part of the filming was featured on an episode of Keeping Up with the Kardashians.
Hilton tweeted a photo of herself and Kardashian on 3 May, captioning it "#SecretProject with @KimKardashian" and quoting a line from the song.