Not sure about the waggle thing, but whatever makes you happy. But yeah, Ready Go is a good one... Although they did have a really good year last year (and I'd say that this year has started out pretty good too), so it doesn't really stand out that much IMO... But it's definitely good.
Also, after spending way too much time and energy on this, these are my top K-pop songs of the year so far (sorta ended up becoming a top 10):
1 4Minute - Volume Up
2 Dal Shabet - Hit U
3 Wonder Girls - The DJ Is Mine
4 4Minute - Dream Racer
5 SPICA - Up N Down
6 Miss A - Lips
7 SPICA - No More
8 4Minute - Say My Name
9 Koyote - Haetteon Mal Tto Hago (Repeat The Same Words)
10 4Minute - Femme Fatale
Did I mention I think 4Minute's latest mini album thingy to be very good? Yeah...
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Nominate B.B. Hood for CB IX http://miniurl.org/ntI