title: List of Ultratop 50 number-one singles of 2003
text: # List of Ultratop 50 number-one singles of 2003
  
  These hits topped the Ultratop 50 charts in 2003 (see 2003 in music).
  
  | Issue Date | Artist | Title |
  | - | - | - |
  | January 4 | Eminem | "Lose Yourself" |
  | January 11 | Eminem | "Lose Yourself" |
  | January 18 | Eminem | "Lose Yourself" |
  | January 25 | Jasper Steverlinck & Steven & Stijn Kolacny | "Life on Mars?" |
  | February 1 | Jasper Steverlinck & Steven & Stijn Kolacny | "Life on Mars" |
  | February 8 | Jasper Steverlinck & Steven & Stijn Kolacny | "Life on Mars" |
  | February 15 | Jasper Steverlinck & Steven & Stijn Kolacny | "Life on Mars" |
  | February 22 | Jasper Steverlinck & Steven & Stijn Kolacny | "Life on Mars" |
  | March 1 | Jasper Steverlinck & Steven & Stijn Kolacny | "Life on Mars" |
  | March 8 | Jasper Steverlinck & Steven & Stijn Kolacny | "Life on Mars" |
  | March 15 | Jasper Steverlinck & Steven & Stijn Kolacny | "Life on Mars" |
  | March 22 | Céline Dion | "I Drove All Night" |
  | March 29 | Spring | "Spring" |
  | April 5 | Spring | "Spring" |
  | April 12 | Spring | "Spring" |
  | April 19 | Spring | "Spring" |
  | April 26 | Spring | "Spring" |
  | May 3 | Spring | "Spring" |
  | May 10 | Spring | "Spring" |
  | May 17 | Spring | "Spring" |
  | May 24 | Peter Evrard | "For You" |
  | May 31 | Peter Evrard | "For You" |
  | June 7 | Peter Evrard | "For You" |
  | June 14 | The Underdog Project & The Sunclub | "Summer Jam 2003" |
  | June 21 | The Underdog Project & The Sunclub | "Summer Jam 2003" |
  | June 28 | The Underdog Project & The Sunclub | "Summer Jam 2003" |
  | July 5 | The Underdog Project & The Sunclub | "Summer Jam 2003" |
  | July 12 | The Underdog Project & The Sunclub | "Summer Jam 2003" |
  | July 19 | The Underdog Project & The Sunclub | "Summer Jam 2003" |
  | July 26 | The Underdog Project & The Sunclub | "Summer Jam 2003" |
  | August 2 | The Underdog Project & The Sunclub | "Summer Jam 2003" |
  | August 9 | The Underdog Project & The Sunclub | "Summer Jam 2003" |
  | August 16 | Wim Soutaer | "Allemaal" |
  | August 23 | Wim Soutaer | "Allemaal" |
  | August 30 | Brahim | "Turn the Music Up" |
  | September 6 | Brahim | "Turn the Music Up" |
  | September 13 | Wim Soutaer | "Allemaal" |
  | September 20 | Brahim | "Turn the Music Up" |
  | September 27 | Lumidee | "Never Leave You (Uh Oooh, Uh Oooh)" |
  | October 4 | The Black Eyed Peas | "Where Is the Love?" |
  | October 11 | The Black Eyed Peas | "Where Is the Love?" |
  | October 18 | The Black Eyed Peas | "Where Is the Love?" |
  | October 25 | The Black Eyed Peas | "Where Is the Love?" |
  | November 1 | Sarah & Koen Wauters | "You Are the Reason" |
  | November 8 | Sarah & Koen Wauters | "You Are the Reason" |
  | November 15 | Sarah & Koen Wauters | "You Are the Reason" |
  | November 22 | Sarah & Koen Wauters | "You Are the Reason" |
  | November 29 | Sarah & Koen Wauters | "You Are the Reason" |
  | December 6 | Natalia | "I've Only Begun to Fight" |
  | December 13 | Natalia | "I've Only Begun to Fight" |
  | December 20 | The Black Eyed Peas | "Shut Up" |
  | December 27 | The Black Eyed Peas | "Shut Up" |
  