# List of Billboard Adult Contemporary number ones of 2006

Adult Contemporary is a chart published by Billboard ranking the top-performing songs in the United States in the adult contemporary music (AC) market. In 2006, 9 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 issue of Billboard of the new year, the number one song was "Up on the Housetop" by Kimberley Locke, which was in its fourth week atop the chart. Canadian singer Daniel Powter's song "Bad Day" had the longest unbroken run of the year at number one, spending consecutive 18 weeks atop the chart, and also had the highest total number of weeks in the top spot, with 19 non-consecutive weeks in the peak position. The song had been a major hit in Europe in 2005, but did not achieve success in the United States until the following year, after its use in the fifth season of the TV talent show American Idol to accompany video packages spotlighting each eliminated contestant. Powter's song was one of only two AC number ones of 2006 to also top Billboard's all-genre chart, the Hot 100, but the singer failed to achieve further success and came to be regarded as a one-hit wonder. The same label has been attached to British singer James Blunt, whose song "You're Beautiful" was the other track to top both charts in 2006.
In the fall, country music group Rascal Flatts topped the AC chart for the first time with its version of the song "What Hurts the Most". It was the trio's fifth Hot Country Songs chart-topper, but only its second song to crossover to the AC chart and the first to achieve sufficient spins on adult contemporary radio to top the listing. The final two AC number ones of the year were both Christmas-themed, continuing a theme which began in the early 21st century, when stations of the relevant format began devoting their playlists exclusively to seasonal songs in December. In the issue of Billboard dated December 23, Kimberley Locke achieved her second number one of the year with her version of "Jingle Bells", making her the only artist to appear at number one with two different songs in 2006. The following week Hall & Oates took the top spot with their recording of the Christmas carol "It Came Upon a Midnight Clear", which was the final number one of the year.

## Chart history

Key :
| † | Indicates best-performing AC song of 2006 |
| Issue date | Title | Artist(s) |
| January 7 | "Up on the Housetop" | Kimberley Locke |
| January 14 | "Lonely No More" | Rob Thomas |
| January 21 | "You and Me" | Lifehouse |
| January 28 | "You and Me" | Lifehouse |
| February 4 | "You and Me" | Lifehouse |
| February 11 | "You and Me" | Lifehouse |
| February 18 | "You and Me" | Lifehouse |
| February 25 | "You and Me" | Lifehouse |
| March 4 | "You and Me" | Lifehouse |
| March 11 | "You and Me" | Lifehouse |
| March 18 | "You're Beautiful" † | James Blunt |
| March 25 | "You're Beautiful" † | James Blunt |
| April 1 | "You're Beautiful" † | James Blunt |
| April 8 | "You're Beautiful" † | James Blunt |
| April 15 | "You and Me" | Lifehouse |
| April 22 | "You're Beautiful" † | James Blunt |
| April 29 | "You're Beautiful" † | James Blunt |
| May 6 | "You're Beautiful" † | James Blunt |
| May 13 | "Bad Day" | Daniel Powter |
| May 20 | "Bad Day" | Daniel Powter |
| May 27 | "Bad Day" | Daniel Powter |
| June 3 | "Bad Day" | Daniel Powter |
| June 10 | "Bad Day" | Daniel Powter |
| June 17 | "Bad Day" | Daniel Powter |
| June 24 | "Bad Day" | Daniel Powter |
| July 1 | "Bad Day" | Daniel Powter |
| July 8 | "Bad Day" | Daniel Powter |
| July 15 | "Bad Day" | Daniel Powter |
| July 22 | "Bad Day" | Daniel Powter |
| July 29 | "Bad Day" | Daniel Powter |
| August 5 | "Bad Day" | Daniel Powter |
| August 12 | "Bad Day" | Daniel Powter |
| August 19 | "Bad Day" | Daniel Powter |
| August 26 | "Bad Day" | Daniel Powter |
| September 2 | "Bad Day" | Daniel Powter |
| September 9 | "Bad Day" | Daniel Powter |
| September 16 | "Unwritten" | Natasha Bedingfield |
| September 23 | "Unwritten" | Natasha Bedingfield |
| September 30 | "Unwritten" | Natasha Bedingfield |
| October 7 | "Unwritten" | Natasha Bedingfield |
| October 14 | "Unwritten" | Natasha Bedingfield |
| October 21 | "Bad Day" | Daniel Powter |
| October 28 | "Unwritten" | Natasha Bedingfield |
| November 4 | "Unwritten" | Natasha Bedingfield |
| November 11 | "Unwritten" | Natasha Bedingfield |
| November 18 | "What Hurts the Most" | Rascal Flatts |
| November 25 | "Unwritten" | Natasha Bedingfield |
| December 2 | "What Hurts the Most" | Rascal Flatts |
| December 9 | "What Hurts the Most" | Rascal Flatts |
| December 16 | "What Hurts the Most" | Rascal Flatts |
| December 23 | "Jingle Bells" | Kimberley Locke |
| December 30 | "It Came Upon a Midnight Clear" | Hall & Oates |