List of Billboard Hot 100 number-one singles of 2009
Chart history

List of Billboard Hot 100 number-one singles of 2009

Section Title: Chart history
Table Section Text: None

Issue date	Song	Artist(s)	Reference(s)

January 3	"Single Ladies (Put a Ring on It)"	Beyoncé

January 10

January 17	"Just Dance"	Lady Gaga featuring Colby O'Donis

January 24

January 31

February 7	"My Life Would Suck Without You"	Kelly Clarkson

February 14

February 21	"Crack a Bottle"	Eminem, Dr. Dre and 50 Cent

February 28	"Right Round"	Flo Rida

March 7

March 14

March 21

March 28

April 4

April 11	"Poker Face"	Lady Gaga

April 18	"Boom Boom Pow"	The Black Eyed Peas

April 25

May 2

May 9

May 16

May 23

May 30

June 6

June 13

June 20

June 27

July 4

July 11	"I Gotta Feeling"

July 18

July 25

August 1

August 8

August 15

August 22

August 29

September 5

September 12

September 19

September 26

October 3

October 10

October 17	"Down"	Jay Sean featuring Lil Wayne

October 24	"3"	Britney Spears

October 31	"Down"	Jay Sean featuring Lil Wayne

November 7	"Fireflies"	Owl City

November 14	"Whatcha Say"	Jason Derulo

November 21	"Fireflies"	Owl City

November 28	"Empire State of Mind"	Jay-Z and Alicia Keys

December 5

December 12

December 19

December 26

Sentence(s)

The "Boom Boom Pow" and the "I Gotta Feeling" were the No. 1 singles of 2009.

final_sentence: The "Boom Boom Pow" and the "I Gotta Feeling" were the No. 1 singles of 2009.