MNK is also Massive New Krew
see here:
http://soundcloud.com/massive-new-kr...g-for-paradise
EDIT:
If MNK changed sex, please tell me, because as far as I know it is a HE. And these are female vocal tracks.
曽我ひとみん is teh voclas for track 2. Track 2 is a remix song from this song ->
http://vgmdb.net/album/28718
ミッキーww vocal info is located in MNK blog.
If you read it's entry, you see someone asked who was the vocal and after some posts it was answered.