page_title: List of Billboard Adult Contemporary number ones of 1999
section_title: Chart history
hierarchical_section_title: List of Billboard Adult Contemporary number ones of 1999 / Chart history
caption_attribution_description: English: R. Kelly at the premiere of Trapped in the Closet Chapter 13-22
context_page_description: Adult Contemporary is a chart published by Billboard ranking the top-performing songs in the United States in the adult contemporary music genre. In 1999, six different songs topped the chart in 52 issues of the magazine, based on weekly airplay data from radio stations compiled by Nielsen Broadcast Data Systems.
  In the first fifty weeks of the year, only four songs held the number one position on the AC chart. In the first issue of Billboard of 1999, "I'm Your Angel", a collaboration between singers R. Kelly and Celine Dion, was in its fourth week at number one. It held the top spot for the first nine weeks of the year to finish with a total of twelve consecutive weeks atop the chart. It was the only AC number one of the year to also top Billboard's all-genre listing, the Hot 100. In the issue dated March 6, the track was displaced from the top of the AC chart by "Angel" by Canadian singer Sarah McLachlan, which also spent twelve consecutive weeks at number one. McLachlan's song was replaced at number one in the issue dated May 29 by "You'll Be in My Heart" by British singer Phil Collins.
caption: R. Kelly was at number one on the first chart of the year with "I'm Your Angel", a duet with Celine Dion.
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