Here are the Number One Hit Singles in the UK for 1999, based on sales.

• 2/1/1999 : (1 week) - Chef - Chocolate Salty Balls (PS I Love You)
• 9/1/1999 : (1 week) - Steps - Heartbeat / Tragedy
• 16/1/1999 : (1 week) - Fatboy Slim - Praise You
• 23/1/1999 : (1 week) - 911 - Little Bit More
• 30/1/1999 : (1 week) - Offspring - Pretty Fly (For A White Guy)
• 6/2/1999 : (1 week) - Armand Van Helden featuring Duane Haeden - You Don't Know Me
• 13/2/1999 : (1 week) - Blondie - Maria
• 20/2/1999 : (1 week) - Lenny Kravitz - Fly Away
• 27/2/1999 : (2 weeks) - Britney Spears - Baby One More Time
• 13/3/1999 : (2 weeks) - Boyzone - When The Going Gets Tough
• 27/3/1999 : (1 week) - B*Witched - Blame It On The Weatherman
• 3/4/1999 : (2 weeks) - Mr Oizo - Flat Beat
• 17/4/1999 : (2 weeks) - Martine McCutcheon - Perfect Moment
• 1/5/1999 : (2 weeks) - Westlife - Swear It Again
• 15/5/1999 : (1 week) - Backstreet Boys - I Want It That Way
• 22/5/1999 : (1 week) - Boyzone - You Needed Me
• 29/5/1999 : (2 weeks) - Shanks and Bigfoot - Sweet Like Chocolate
• 12/6/1999 : (1 week) - Baz Luhrmann - Everybody's Free (To Wear Sunscreen)
• 19/6/1999 : (1 week) - S Club 7 - Bring It All Back
• 26/6/1999 : (1 week) - Vengaboys - Boom Boom Boom Boom
• 3/7/1999 : (2 weeks) - ATB - 9PM (Till I Come)
• 17/7/1999 : (3 weeks) - Ricky Martin - Livin' La Vida Loca
• 7/8/1999 : (2 weeks) - Ronan Keating - When You Say Nothing At All
• 21/8/1999 : (1 week) - Westlife - If I Let You Go
• 28/8/1999 : (1 week) - Geri Halliwell - Mi Chico Latino
• 4/9/1999 : (2 weeks) - Lou Bega - Mambo No 5
• 18/9/1999 : (1 week) - Vengaboys - We're Going To Ibiza
• 25/9/1999 : (3 weeks) - Eiffel 65 - Blue (Da Ba Dee)
• 16/10/1999 : (2 weeks) - Christina Aguilera - Genie In A Bottle
• 30/10/1999 : (1 week) - Westlife - Flying Without Wings
• 6/11/1999 : (1 week) - Five - Keep On Movin'
• 13/11/1999 : (1 week) - Geri Halliwell - Lift Me Up
• 20/11/1999 : (1 week) - Robbie Williams - She's The One
• 27/11/1999 : (1 week) - Wamdue Project - King Of My Castle
• 4/12/1999 : (3 weeks) - Cliff Richard - Millennium Prayer
• 25/12/1999 : (4 weeks) - Westlife - I Have A Dream / Seasons In The Sun

On to 2000
Back to 1998

Singles are shown with the date they entered the Number One slot. UK_Charter is an autonoder under the control of spiregrain.