Michelle Williams "The Greatest" (1 Day/Peak: 10) Common f/ Pharrell "UMC" (7 Days/Peak: 4) The Killers "Human" (3 Days/Peak: 4) Leona Lewis "Forgive Me" (12 Days/Peak: 4) Taylor Swift "Love Story" (20 Days/Peak: 1[4])
Pussycat Dolls "IHTP"(10th Day/-4/Peak: 4) Ciara f/ T-Pain "Go Girl" (18th Day/-4/Peak: 1[2]) T.I. f/ Rihanna "Live Your Life" (1st Day/DEBUT/Peak: 8) Keri Hilson f/ Timbaland "Return The Favor" (5th Day/-3/Peak: 4) Natasha Bedingfield "Angel" (35th Day/+3/Peak: 1[4]) Brandy "Right Here (Departed)" (40th Day/+2/Peak: 1[4]/RETIRED) Mariah Carey "I Stay In Love" (2nd Day/+4/Peak: 4) Chris Brown f/ Keri Hilson "Superhuman" (8th Day/=/Peak: 1[1]) Britney Spears "Womanizer" (15th Day/-1/Peak: 1[5]) Beyonce "If I Were A Boy" (12th Day/+1/Peak: 1[4])
The Killers "Human" at #10
Christina Aguilera "Keeps Gettin' Better"
Fergie "Clumsy" (January 2nd)
Jordin Sparks "Tattoo" (January 24th)
Alicia Keys "Like You'll Never See Me Again" (February 4th)
Chris Brown "With You" (February 11th)
Britney Spears "Piece Of Me" (February 25th)
Janet Jackson "Feedback" (March 7th)
Rihanna "Don't Stop The Music" (March 11th)
Carrie Underwood "All-American Girl" (March 26th)
Paula Abdul "Dance Like There's No Tomorrow" (April 18th)
Leona Lewis "Bleeding Love" (April 21st)
Jordin Sparks f/ Chris Brown "No Air" (April 21st)
Mariah Carey "Touch My Body" (April 23rd)
Britney Spears "Break The Ice" (May 9th)
Madonna f/ Justin Timberlake and Timbaland "4 Minutes" (May 30th)
Usher f/ Young Jeezy "Love In This Club" (June 2nd)
Alicia Keys "Teenage Love Affair" (June 18th)
Rihanna "Take A Bow" (June 23rd)
Chris Brown "Forever" (June 27th)
Maroon 5 f/ Rihanna "If I Never See Your Face Again" (July 11th)
Carrie Underwood "Last Name" (July 11th)
Pussycat Dolls "When I Grow Up" (August 8th)
Jordin Sparks "One Step At A Time" (August 13th)
Alicia Keys "Superwoman" (September 9th)
Rihanna "Disturbia" (September 17th)
Coldplay "Viva La Vida" (September 30th)
Carrie Underwood "Just A Dream" (October 6th)
Pink "So What" (October 17th)
Brandy "Right Here (Departed)" (October 31st)
Duffy "Stepping Stone"
Coldplay "Lovers In Japan"
Ludacris f/ T-Pain "One More Drink"
Kevin Rudolf "Let It Rock" (20 Days/Peak: 1[2]) Common f/ Pharrell "UMC" (7 Days/Peak: 4) Taylor Swift "Love Story" (20 Days/Peak: 1[4]) Leona Lewis "Forgive Me" (12 Days/Peak: 4) Pussycat Dolls "IHTP" (10 Days/Peak: 4)
The Killers "Human" (4th Day/RETURN/Peak: 4) Ciara f/ T-Pain "Go Girl" (19th Day/=/Peak: 1[2]) Christina Aguilera "KGB" (1st Day/DEBUT/Peak: 8) Keri Hilson f/ Timbaland "Return The Favor" (6th Day/=/Peak: 4) Natasha Bedingfield "Angel" (36th Day/=/Peak: 1[4]) T.I. f/ Rihanna "Live Your Life" (2nd Day/+3/Peak: 5) Britney Spears "Womanizer" (16th Day/-2/Peak: 1[5]) Beyonce "If I Were A Boy" (13th Day/-2/Peak: 1[4]) Mariah Carey "I Stay In Love" (3rd Day/+2/Peak: 2) Chris Brown f/ Keri Hilson "Superhuman" (9th Day/+2/Peak: 1[2])
Pussycat Dolls "ITHP" at #10
Brandy "Right Here (Departed)" at #5 [RETIRED]
None
Fergie "Clumsy" (January 2nd)
Jordin Sparks "Tattoo" (January 24th)
Alicia Keys "Like You'll Never See Me Again" (February 4th)
Chris Brown "With You" (February 11th)
Britney Spears "Piece Of Me" (February 25th)
Janet Jackson "Feedback" (March 7th)
Rihanna "Don't Stop The Music" (March 11th)
Carrie Underwood "All-American Girl" (March 26th)
Paula Abdul "Dance Like There's No Tomorrow" (April 18th)
Leona Lewis "Bleeding Love" (April 21st)
Jordin Sparks f/ Chris Brown "No Air" (April 21st)
Mariah Carey "Touch My Body" (April 23rd)
Britney Spears "Break The Ice" (May 9th)
Madonna f/ Justin Timberlake and Timbaland "4 Minutes" (May 30th)
Usher f/ Young Jeezy "Love In This Club" (June 2nd)
Alicia Keys "Teenage Love Affair" (June 18th)
Rihanna "Take A Bow" (June 23rd)
Chris Brown "Forever" (June 27th)
Maroon 5 f/ Rihanna "If I Never See Your Face Again" (July 11th)
Carrie Underwood "Last Name" (July 11th)
Pussycat Dolls "When I Grow Up" (August 8th)
Jordin Sparks "One Step At A Time" (August 13th)
Alicia Keys "Superwoman" (September 9th)
Rihanna "Disturbia" (September 17th)
Coldplay "Viva La Vida" (September 30th)
Carrie Underwood "Just A Dream" (October 6th)
Pink "So What" (October 17th)
Brandy "Right Here (Departed)" (October 31st)
Duffy "Stepping Stone"
Coldplay "Lovers In Japan"
Ludacris f/ T-Pain "One More Drink"
Michelle Williams "The Greatest" (1 Day/Peak: 10)
Common f/ Pharrell "UMC" (7 Days/Peak: 4)
The Killers "Human" (3 Days/Peak: 4)
Leona Lewis "Forgive Me" (12 Days/Peak: 4)
Taylor Swift "Love Story" (20 Days/Peak: 1[4]) 
Pussycat Dolls "IHTP"(10th Day/-4/Peak: 4)
Ciara f/ T-Pain "Go Girl" (18th Day/-4/Peak: 1[2])
T.I. f/ Rihanna "Live Your Life" (1st Day/DEBUT/Peak: 8)
Keri Hilson f/ Timbaland "Return The Favor" (5th Day/-3/Peak: 4)
Natasha Bedingfield "Angel" (35th Day/+3/Peak: 1[4]) 
Brandy "Right Here (Departed)" (40th Day/+2/Peak: 1[4]/RETIRED)
Mariah Carey "I Stay In Love" (2nd Day/+4/Peak: 4)
Chris Brown f/ Keri Hilson "Superhuman" (8th Day/=/Peak: 1[1]) 
Britney Spears "Womanizer" (15th Day/-1/Peak: 1[5])
Beyonce "If I Were A Boy" (12th Day/+1/Peak: 1[4])
