@TofuBunny: I did know "Bad Girl" and "The Great Escape" (love both songs!

), but I have never heard of the others before!
I think I know most of SNSD's cutesy songs (like "Genie", "Gee" or "Oh!"), so it would be cool if somebody could recommend some more mature songs!
And some songs/performances from their earlier years (before "Gee"!)?!