Thanks to Rapha Clarkson, charmed_kai, addicted2kelly, Pedro-Spears, Unreachable_Boy, udesai93, Lord Of Countdowns, SaMdAmAn477 and lilaznchuck for commenting!
15. Beyoncé - Listen (3rd day/-2/PP: 6)
14. The All-American Rejects - It Ends Tonight (15 days/PP: 8)
13. Plain White T's - Hate (I Really Don't Like You)
12. The Pussycat Dolls - Wait A Minute (4 days/PP: 8)
11. RBD - Tu Amor (16 days/PP: 5)
JoJo - How To Touch A Girl (5th day/RETURN/PP: 9) Nelly Furtado - Say It Right (11th day/=/PP: 5) Pitty - Na Sua Estante (30th day/+2/PP: 1 [6]) Gwen Stefani - Wind It Up (22nd day/=/PP: 1 [2]) My Chemical Romance - Famous Last Words (14th day/-1/PP: 3) Evanescence - Lithium (4th day/+1/PP: 5) Shakira - Illegal (20th day/=/PP: 3) AFI - Love Like Winter (9th day/=/PP: 3) The Fray - How To Save A Life (12th day/-1/PP: 1 [1]) Justin Timberlake - My Love (45th day/+1/PP: 1 [7])
Beyoncé - Listen (3rd day/-2/PP: 6)
The Fray - How To Save A Life (1 day)
Fergie - Fergalicious (2 days)
Gwen Stefani - Wind It Up (2 days)
Justin Timberlake - My Love (7 days)
Pitty - Na Sua Estante (6 days)
My Chemical Romance - Welcome To The Black Parade (4 days)
JoJo - Too Little Too Late (7 days)
Green Day & U2 - The Saints Are Coming (6 days)
Beyoncé - Irrepleacable (9 days)
Nx Zero - Além De Mim (4 days)
Christina Aguilera - Hurt (14 days)
Rihanna - SOS (1 day)
Simple Plan - Untitled (2 days)
The Pussycat Dolls - Buttons (3 days)
Panic! At The Disco - Lying Is The Most Fun A Girl Can Have Without Taking Her Clothes Off (4 days)
Thanks to Rapha Clarkson, Hazel.Eyes.Filipe, mariah_4life, faint_lpc, Pedro-Spears, udesai93, Fireman25 and Unreachable_Boy for your comments!
15. Plain White T's - Hate (I Really Don't Like You)
14. U2 & Green Day - The Saints Are Coming (36 days/PP: 1 [6])
13. RBD - Tu Amor (16 days/PP: 5)
12. The All-American Rejects - It Ends Tonight (15 days/PP: 8)
11. The Pussycat Dolls - Wait A Minute (4 days/PP: 8)
JoJo - How To Touch A Girl (6th day/=/PP: 9) Shakira - Illegal (21st day/-5/PP: 3) My Chemical Romance - Famous Last Words (16th day/-2/PP: 3) Pitty - Na Sua Estante (31st day/+1/PP: 1 [6]) Gwen Stefani - Wind It Up (23rd day/+1/PP: 1 [2]) Nelly Furtado - Say It Right (12th day/+4/PP: 5) AFI - Love Like Winter (10th day/-1/PP: 3) Evanescence - Lithium (5th day/+2/PP: 3) The Fray - How To Save A Life (13th day/=/PP: 1 [1]) Justin Timberlake - My Love (46th day/=/PP: 1 [8])
None.
The Fray - How To Save A Life (1 day)
Fergie - Fergalicious (2 days)
Gwen Stefani - Wind It Up (2 days)
Justin Timberlake - My Love (8 days)
Pitty - Na Sua Estante (6 days)
My Chemical Romance - Welcome To The Black Parade (4 days)
JoJo - Too Little Too Late (7 days)
Green Day & U2 - The Saints Are Coming (6 days)
Beyoncé - Irrepleacable (9 days)
Nx Zero - Além De Mim (4 days)
Christina Aguilera - Hurt (14 days)
Rihanna - SOS (1 day)
Simple Plan - Untitled (2 days)
The Pussycat Dolls - Buttons (3 days)
Panic! At The Disco - Lying Is The Most Fun A Girl Can Have Without Taking Her Clothes Off (4 days)
JoJo - How To Touch A Girl (5th day/RETURN/PP: 9)
Nelly Furtado - Say It Right (11th day/=/PP: 5)
Pitty - Na Sua Estante (30th day/+2/PP: 1 [6])
Gwen Stefani - Wind It Up (22nd day/=/PP: 1 [2])
My Chemical Romance - Famous Last Words (14th day/-1/PP: 3)
Evanescence - Lithium (4th day/+1/PP: 5)
Shakira - Illegal (20th day/=/PP: 3) 
AFI - Love Like Winter (9th day/=/PP: 3)
The Fray - How To Save A Life (12th day/-1/PP: 1 [1])
Justin Timberlake - My Love (45th day/+1/PP: 1 [7])
Beyoncé - Listen (3rd day/-2/PP: 6)
(L)