The #1 song in the UK on January 21, 2009

Just Dance By Lady Gaga featuring Colby O'Donis

Other #1 songs on January 21, 2009

#1 Hit Song

Just Dance
Lady Gaga featuring Colby O'Donis

#1 R&B Song

Single Ladies (Put a Ring on It)
Beyoncé

#1 Country Song

Start a Band
Brad Paisley duet with Keith Urban

#1 Alternative Hit

Sex on Fire
Kings of Leon

#1 Dance Track

Human
The Killers

Notable January 21 birthdays in the 2000s

Zoey Diaz
TV Actress
Born January 21, 2005
Thea Floer Kulseng
World Music Singer
Born January 21, 2003
Lindsey Lamer
TV Actress
Born January 21, 2007
Jackson Brundage
TV Actor
Born January 21, 2001
Ben Carolan
Movie Actor
Born January 21, 2000
Brooklyn A Robinson
Movie Actress
Born January 21, 2008
Princess Ingrid Alexandra
Princess
Born January 21, 2004