Brown Eyed Girls - Sixth Sense (1st week / DEBUT / Peak: 1[1])
I wanted to retire songs with 20 weeks on chart, but since there's a lot of good music coming out, I'll retire songs with 20 weeks on chart OR 10 weeks in top 10 OR 5 weeks at #1. That's it, comment.
Glad to see you back!
Sunny Hill - Prayer (3rd week / RETURN / Peak: 10)
HyunA - Bubble Pop! (3rd week / RETURN / Peak: 4)
Sistar19 - Ma Boy (14th week / RETURN / Peak: 1[3])
Sunny Hill - Midnight Circus (13th week / -5 / Peak: 2)
f(x) - Hot Summer (11th week / RETURN / Peak: 1[1])
Girls' Generation - Bad Girl (3rd week / RETURN / Peak: 1[1])
Dal★Shabet - Pink Rocket (16th week / = / Peak: 1[1])
T-ara - Roly-Poly (10th week / +7 / Peak: 1[2])
After School - In The Night Sky (7th week / -7 / Peak: 1[1])
Brave Girls - Easily (6th week / -7 / Peak: 1[1])
Beyoncé - Best Thing I Never Had (7th week / RETURN / Peak: 10)
Nicole Scherzinger - Don't Hold Your Breath (2nd week / +6 / Peak: 9)
G.NA - Top Girl (2nd week / +3 / Peak: 8)
Koda Kumi - V.I.P. (1st week / DEBUT / Peak: 7)
U-KISS - NEVERLAND (2nd week / +10 / Peak: 6)
Kyary Pamyu Pamyu - PONPONPON (3rd week / -2 / Peak: 3)
Kara - Step (2nd week / -3 / Peak: 1[1])
G.NA - BANANA (3rd week / -1 / Peak: 1[1])
Crispi Crunch - Thumbs Up (1st week / DEBUT / Peak: 2)
Demi Lovato - Skyscraper (2nd week / RETURN / Peak: 5)
Girls' Generation - Bad Girl (4th week / -3 / Peak: 1[1])
Super Junior - Mr. Simple (5th week / RETURN / Peak: 3)
Rainbow - A (Japanese Ver.) (2nd week / -12 / Peak: 1[1])
JYJ - In Heaven (1st week / DEBUT / Peak: 9)
Brave Girls - Easily (7th week / +8 / Peak: 1[1])
That's it, comment. 
AKB48 - Flying Get (1st week / DEBUT / Peak: 18)
Koda Kumi - IN THE AIR (1st week / DEBUT / Peak: 16)
Super Junior - A-CHA (1st week / DEBUT / Peak: 9)
T-ara - Bo Peep Bo Peep (Japanese Ver.) (2nd week / RETURN / Peak: 6)
Brown Eyed Girls - Sixth Sense (2nd week / -1 / Peak: 1[1])