Usher I Don T Know

• 
  04:27
  Usher I Don't Know
• 
  04:26
  Usher I Don't Know (Feat. P. Diddy)
• 
  04:26
  Usher I Don't Know (with Puff Daddy)
• 04:26
  Usher feat P.Diddy I Don't Know
• 04:29
  Usher feat. Diddy I Don't Know (Produced By The Neptunes)