thumb|[[Mariah Carey spent fifteen weeks atop the Hot 100 in 2005, with fourteen of them being "We Belong Together", which became the second longest running number one single on the chart, following Carey's "One Sweet Day".]]
The Billboard Hot 100 is a chart that ranks the best-performing singles of the United States. Published by Billboard magazine, the data are compiled by Nielsen SoundScan based collectively on each single's weekly physical and digital sales, and airplay. In 2005, there were eight singles that topped the chart in fifty-three issues of the magazine, the second lowest of any year.
During the year, five acts achieved their first US number-one single, either as a lead artist or featured guest: Mario, Olivia, Gwen Stefani, Carrie Underwood, and Chris Brown. Stefani earned her first number-one single in the United States this year, although she had been with band the No Doubt since 1986. Hip hop artist Kanye West gained his first number-one single, "Gold Digger", as lead artist; West previously had a number-one single with "Slow Jamz", a 2004 song by rapper Twista. Two acts, Underwood and Brown, scored a number-one debut single this year. Mariah Carey was the only act to have more than one number one song, with her earning two.
Mariah Carey's "We Belong Together" is the longest-running single of 2005, topping the Billboard Hot 100 for 14 non-consecutive weeks. The single is tied with "I Gotta Feeling" by American group The Black Eyed Peas for the longest-running number-one single of the decade. As of 2018, "We Belong Together" was tied for the second longest-running number-one single in the entire Hot 100 era behind Boyz II Men's and Carey's 1995 single "One Sweet Day", which spent sixteen weeks at number one. Despite being surpassed by three other songs during the years, "We Belong Together" still is one of the songs with the most weeks spent at number one in the entire Hot 100 history. West's "Gold Digger" is the second longest-running, having peaked the chart for 10 consecutive weeks. Other singles with extended chart runs include R&B singer Mario's "Let Me Love You", his best-performing song to date, and rapper 50 Cent's "Candy Shop", each spent nine straight weeks at number one.
Carey is the only artist to have earned two number-one singles in 2005 after "Don't Forget About Us" topped the chart in the final calendar issue of Billboard Hot 100. "Don't Forget About Us" is Carey's 17th number-one single, placing her third in the list of acts with most number ones in the United States at the time,
Chart history
thumb|150px|R&B singer [[Mario (entertainer)|Mario scored his first number-one single with "Let Me Love You", which spent at the top spot for nine consecutive weeks, becoming his best-performing single as of 2005.|alt=A young black man with short black hair, wearing sunglasses and a gray-and-white checked shirt.]]
thumb|150px|Singer [[Gwen Stefani earned her first number one single "Hollaback Girl" in U.S.|alt=A woman with blonde curly hair, singing on stage wearing an ornamental military-style jacket and cap.]]
thumb|150px| Country singer [[Carrie Underwood earned her first number one single "Inside Your Heaven" in U.S., and stayed at the top for one week.|alt=A young woman with blonde hair in a red top, holding a microphone and singing with her eyes closed. ]]
thumb|150px|Singer [[Chris Brown (American singer)|Chris Brown earned his first number one single "Run It!" in U.S., and stayed at the top for five consecutive weeks.|alt=A man in a red hat, wearing a long red t-shirt over a red long-sleeved shirt, holding a microphone in his right hand.]]
{| class="wikitable" style="font-size:90%;"
|+Key
|style="background-color:#FFFF99"|
|Indicates best-performing single of 2005
|}
{| class="wikitable"
! width=31|
!align="center"|Issue date
!align="center"|Song
!align="center"|Artist(s)
!align="center"|Reference(s)
|-
| bgcolor=#EDEAE0 align=center rowspan=9|911
|align="left"|January 1
|align="center" rowspan="9"|"Let Me Love You"
|align="center" rowspan="9"|Mario
|align="center"|
|-
|align="left"|January 8
|align="center"|
|-
|align="left"|January 15
|align="center"|
|-
|align="left"|January 22
|align="center"|
|-
|align="left"|January 29
|align="center"|
|-
|align="left"|February 5
|align="center"|
|-
|align="left"|February 12
|align="center"|
|-
|align="left"|February 19
|align="center"|
|-
|align="left"|February 26
|align="center"|
|-
| bgcolor=#EDEAE0 align=center rowspan=9|912
|align="left"|March 5
|align="center" rowspan="9"|"Candy Shop"
|align="center" rowspan="9"|50 Cent featuring Olivia
|align="center"|
|-
|align="left"|March 12
|align="center"|
|-
|align="left"|March 19
|align="center"|
|-
|align="left"|March 26
|align="center"|
|-
|align="left"|April 2
|align="center"|
|-
|align="left"|April 9
|align="center"|
|-
|align="left"|April 16
|align="center"|
|-
|align="left"|April 23
|align="center"|
|-
|align="left"|April 30
|align="center"|
|-
| bgcolor=#EDEAE0 align=center rowspan=4|913
|align="left"|May 7
|align="center" rowspan="4"|"Hollaback Girl"
|align="center" rowspan="4"|Gwen Stefani
|align="center"|
|-
|align="left"|May 14
|align="center"|
|-
|align="left"|May 21
|align="center"|
|-
|align="left"|May 28
|align="center"|
|-
| bgcolor=#EDEAE0 align=center rowspan=4|914
|align="left"|June 4
|bgcolor=#FFFF99 align="center" rowspan="4"|"We Belong Together"
|align="center" rowspan="4"|Mariah Carey
|align="center"|
|-
|align="left"|June 11
|align="center"|
|-
|align="left"|June 18
|align="center"|
|-
|align="left"|June 25
|align="center"|
|-
| bgcolor=#EDEAE0 align=center|915
|align="left"|July 2
|align="center"|"Inside Your Heaven"
|align="center"|Carrie Underwood
|align="center"|
|-
| bgcolor=#EDEAE0 align=center rowspan=10|re
|align="left"|July 9
|bgcolor=#FFFF99 align="center" rowspan="10"|"We Belong Together"
|align="center" rowspan="10"|Mariah Carey
|align="center"|
|-
|align="left"|July 16
|align="center"|
|-
|align="left"|July 23
|align="center"|
|-
|align="left"|July 30
|align="center"|
|-
|align="left"|August 6
|align="center"|
|-
|align="left"|August 13
|align="center"|
|-
|align="left"|August 20
|align="center"|
|-
|align="left"|August 27
|align="center"|
|-
|align="left"|September 3
|align="center"|
|-
|align="left"|September 10
|align="center"|
|-
| bgcolor=#EDEAE0 align=center rowspan=10|916
|align="left"|September 17
|align="center" rowspan="10"|"Gold Digger"
|align="center" rowspan="10"|Kanye West featuring Jamie Foxx
|align="center"|
|-
|align="left"|September 24
|align="center"|
|-
|align="left"|October 1
|align="center"|
|-
|align="left"|October 8
|align="center"|
|-
|align="left"|October 15
|align="center"|
|-
|align="left"|October 22
|align="center"|
|-
|align="left"|October 29
|align="center"|
|-
|align="left"|November 5
|align="center"|
|-
|align="left"|November 12
|align="center"|
|-
|align="left"|November 19
|align="center"|
|-
| bgcolor=#EDEAE0 align=center rowspan=5|917
|align="left"|November 26
|align="center" rowspan="5"|"Run It!"
|align="center" rowspan="5"|Chris Brown
|align="center"|
|-
|align="left"|December 3
|align="center"|
|-
|align="left"|December 10
|align="center"|
|-
|align="left"|December 17
|align="center"|
|-
|align="left"|December 24
|align="center"|
|-
| bgcolor=#EDEAE0 align=center|918
|align="left"|December 31
|align="center"|"Don't Forget About Us"
|align="center"|Mariah Carey
|align="center"|
|-
|}
Number-one artists
{| class="wikitable plainrowheaders" style="text-align:center;"
|+ List of number-one artists by total weeks at number one
! Position
! Artist
! Weeks at No. 1
|-
| 1
| Mariah Carey
| 15
|-
| rowspan=2| 2
| Kanye West
| rowspan=2| 10
|-
| Jamie Foxx
|-
| rowspan=3| 4
| Mario
| rowspan=3| 9
|-
| 50 Cent
|-
| Olivia
|-
| 7
| Chris Brown
| 5
|-
| 8
| Gwen Stefani
| 4
|-
| 9
| Carrie Underwood
| 1
|}
See also
- 2005 in music
- List of Billboard number-one singles
- Billboard Year-End Hot 100 singles of 2005
- List of Billboard Hot 100 number-one singles of the 2000s
References
Additional sources
- Fred Bronson's Billboard Book of Number 1 Hits, 5th Edition ()
- Joel Whitburn's Top Pop Singles 1955-2008, 12 Edition ()
- Joel Whitburn Presents the Billboard Hot 100 Charts: The 2000s ()
- Additional information obtained can be verified within Billboard's online archive services and print editions of the magazine.