U Know What's Up

"U Know What's Up"
Single by Donell Jones
from the album Where I Wanna Be
B-side	"Shorty (Got Her Eyes on Me)" (excerpt)
Released	August 3, 1999 (1999-08-03)
Length	3:59
Label	LaFace Arista Untouchables
Songwriter(s)	Edward Ferrell Darren Lighty Clifton Lighty Balewa Muhammad Anthony Hamilton Veronica McKenzie
Producer(s)	Eddie F. Darren Lighty
Donell Jones singles chronology
"You Should Know" (1997) "U Know What's Up" (1999) "It's So Hard" (2000)
Lisa Lopes singles chronology
"Cradle of Rock" (1998) "U Know What's Up" (1999) "I Do" (1999)

"U Know What's Up" is a song by American R&B singer Donell Jones. It was written by Edward "Eddie F." Ferrell, Darren Lighty, Clifton Lighty, Balewa Muhammad, Anthony Hamilton, and Veronica McKenzie for his second studio album, Where I Wanna Be (1999), while production was helmed by Ferrell and Darren Lighty for Untouchables Entertainment.

Released as the album's lead single, the song became Jones' biggest hit, peaking at number seven on the Billboard Hot 100. In addition, "U Know What's Up" topped Billboard's Hot R&B/Hip-Hop Singles & Tracks chart for eight consecutive weeks, his only single to do so to date. A remix version featuring Left Eye of TLC was used for the accompanying music video. Outside of the United States, "U Know What's Up" peaked within the top ten of the charts in Ireland and the United Kingdom.