shadows of echoes of memories of songs

See, now, I wasn't sure about that, so I looked it up, and the lyrics that I found on the web said "aiko aiko all day". I can't remember where the ones I found actually were, but it wasn't the only one that says that:

http://www.lyricstime.com/lyrics/30495.html (http://www.lyricstime.com/lyrics/30495.html)
http://www.lyricsfreak.com/g/grateful-dead/62486.html (http://www.lyricsfreak.com/g/grateful-dead/62486.html)
http://dannyman.toldme.com/lyrics/Grateful_Dead/Aiko_Aiko.html (http://dannyman.toldme.com/lyrics/Grateful_Dead/Aiko_Aiko.html)

And those all claim to be the lyrics of the Grateful Dead version, so now. (So now.)

On the other hand, the ones that spell it "iko iko" (er, like what I did, oops) seem to have "unday" or "an day":

http://www.lyricscrawler.com/song/42879.html (http://www.lyricscrawler.com/song/42879.html)
http://www.lyricsxp.com/lyrics/i/iko_iko_aaron_carter.html (http://www.lyricsxp.com/lyrics/i/iko_iko_aaron_carter.html)
http://www.maxlyrics.com/songView/7629 (http://www.maxlyrics.com/songView/7629) (Cyndi Lauper??)