List of 100 Grand International number-one songs of 2005

The 100 Grand International is a chart that ranks the best-performing international songs in Valstrath. Its data, published by The Grand magazine and compiled by Tiescon SoundScan, is based collectively on each song's weekly physical and digital sales, as well as the amount of airplay received on Versalian radio stations and streaming on online digital music outlets.
During 2005, seventeen singles reached number one on the 100 Grand, a eighteenth single, "Boulevard of Broken Dreams" by Green Day, began its run at number one in December 2004. In total, seventeen acts topped the chart as either lead or featured artists, with seven—Kelly Clarkson, Olivia, Gwen Stefani (as a solo artist), Jack Johnson, Fall Out Boy, De La Soul and Rihanna—achieving their first 100 Grand number-one single.
The longest running number one song of the year was "Best of You" by Foo Fighters, that spent 17 weeks at the top of the charts, the song also topped the Year-End 100 Grand.
Green Day and System of a Down were the only acts to achieve multiple number one singles, with three and two respectively.
== Chart History ==
The Bold song represents the song of the year.
Issue Date 	Song 	Artist
January 1 	"Boulevard of Broken Dreams" 	Green Day
January 8 	"Boulevard of Broken Dreams" 	Green Day
January 15 	"Boulevard of Broken Dreams" 	Green Day
January 22 	"Boulevard of Broken Dreams" 	Green Day
January 29 	"Boulevard of Broken Dreams" 	Green Day
February 5 	"Boulevard of Broken Dreams" 	Green Day
February 12 	"Boulevard of Broken Dreams" 	Green Day
February 19 	"Boulevard of Broken Dreams" 	Green Day
February 26 	"Boulevard of Broken Dreams" 	Green Day
March 5 	"Since U Been Gone" 	Kelly Clarkson
March 12 	"Candy Shop" 	50 Cent ft. Olivia
March 19 	"Candy Shop" 	50 Cent ft. Olivia
March 26 	"Be Yourself" 	Audioslave
April 2 	"Be Yourself" 	Audioslave
April 9 	"Be Yourself" 	Audioslave
April 16 	"Be Yourself" 	Audioslave
April 23 	"B.Y.O.B." 	System of a Down
April 30 	"B.Y.O.B." 	System of a Down
May 7 	"B.Y.O.B." 	System of a Down
May 14 	"Hollaback Girl" 	Gwen Stefani
May 21 	"Sitting, Waiting, Wishing" 	Jack Johnson
May 28 	"Holiday" 	Green Day
June 4 	"Holiday" 	Green Day
June 11 	"Sugar, We're Going Down" 	Fall Out Boy
June 18 	"Best of You" 	Foo Fighters
June 25 	"Best of You" 	Foo Fighters
July 2 	"Best of You" 	Foo Fighters
July 9 	"Best of You" 	Foo Fighters
July 16 	"Best of You" 	Foo Fighters
July 23 	"Best of You" 	Foo Fighters
July 30 	"Best of You" 	Foo Fighters
August 6 	"Best of You" 	Foo Fighters
August 13 	"Best of You" 	Foo Fighters
August 20 	"Best of You" 	Foo Fighters
August 27 	"Best of You" 	Foo Fighters
September 3 	"Best of You" 	Foo Fighters
September 10	"Best of You" 	Foo Fighters
September 17	"Best of You" 	Foo Fighters
September 24	"Best of You" 	Foo Fighters
October 1 	"Best of You" 	Foo Fighters
October 8 	"Best of You" 	Foo Fighters
October 15 	"Don't Lie" 	Black Eyed Peas
October 22 	"Don't Lie" 	Black Eyed Peas
October 29 	"Feel Good Inc." 	Gorillaz ft. De La Soul
November 5 	"Feel Good Inc." 	Gorillaz ft. De La Soul
November 12 	"Pon de Replay" 	Rihanna
November 19 	"Lonely" 	Akon
November 26 	"Lonely" 	Akon
December 3 	"Wake Me Up When September Ends"	Green Day
December 10 	"Wake Me Up When September Ends"	Green Day
December 17 	"Hypnotize" 	System of a Down
December 24 	"Hypnotize" 	System of a Down
December 31 	"Photograph" 	Nickelback
== Extra Info ==
* System of a Down became the first heavy metal band to score multiple number one songs in two different years, with the songs "B.Y.O.B." and "Hypnotize in 2005 and "Chop Suey!" and "Toxicity" in 2001.
* Fall Out Boy scored their first number one song with "Sugar, We're Going Down".
* With "Best of You", Foo Fighters stayed 17 weeks at number one in the charts, becoming the longest running number one single of the year and third longest of all time.
* Barbadian singer Rihanna scored her first number one single with "Pon de Replay"
=== Year End Top 10 ===
 	Song 	Artist 	Peak And Duration
1 	"Best of You" 	Foo Fighters 	#1 for 17 weeks
2 	"Boulevard of Broken Dreams"	Green Day 	#1 for 9 weeks (in 2005 - 13 total)
3 	"Be Yourself" 	Audioslave 	#1 for 4 weeks
4 	"Don't Lie" 	Black Eyed Peas 	#1 for 2 weeks
5 	"Candy Shop" 	50 Cent ft. Olivia 	#1 for 2 weeks
6 	"B.Y.O.B." 	System of a Down 	#1 for 3 weeks
7 	"Feel Good Inc." 	Gorillaz ft. De La Soul	#1 for 2 weeks
8 	"Holiday" 	Green Day 	#1 for 2 weeks
9 	"Sugar, We're Going Down" 	Fall Out Boy 	#1 for 1 week
10	"Pon de Replay" 	Rihanna 	#1 for 1 week