"Boy You Knock Me Out" is a song by American actress and singer Tatyana Ali from her only studio album, Kiss the Sky (1998).

Written by Kelly Price, StoneBridge, and Nick Nice, the track samples "Summer Madness" by Kool & the Gang and "What You Won't Do for Love" by Bobby Caldwell.

The single version of the song, known as the "Big Willie Style" edit, features Will Smith performing a rap.

Tatyana Ali was recruited by her co-star on The Fresh Prince of Bel-Air, Will Smith, to launch her own music career, and she postponed attending Harvard University so she could record Kiss the Sky.

[3][4] Although MJJ Music and Work Group serviced "Boy You Knock Me Out" to US radio in October 1998, it did not chart on the Billboard Hot 100 like its predecessor, "Daydreamin'".