IMMORAL was originally sung by Mami Kawada. I wonder whose version will turn out better.
You should really listen to the whole albums!

I didn't know any I've singers besides Eiko Shimamiya until I downloaded LAMENT and OUT FLOW, but now I pretty much love 'em all.
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http://www.ustream.tv/recorded/15905254 TRIBAL LINK's Day Stage. The whole thing, completely free of charge and no registering required. Watch away!
I'm currently halfway through with the show. Larval Stage Planning was good - they sang well, Airi and Nami were adorable, but Lin looked like she was in pain for the first two songs. LSP's mainstream debut song was also heard. It was awfully average. Yui Sakakibara was... unexpected. Her outfit was freaking bizarre, she looked like my aunt and sounded like a four-year-old in her first song. o_o Kaorin was awesome. Her songs rocked and she pulled them off with style. Eiko Shimamiya performed well, but the songs she was given are seriously far from top-notch. To her credit, she almost saved SHIFT. Now, off to watch the rest.
Edit: Okay, wow, Mami's portion was REALLY bad. She ruined The Castle of Sand with her overenthusiastic singing and slurry Engrish. I think it would've been a lot better even with the small change of her singing more quietly. Lupe's verses also suffered from the energetic delivery, but at least the chorus was good. Miyuki Hashimoto's rendition of birthday eve was very good but WHAT WAS THAT THING SHE WAS WEARING were all of these women drunk while picking their outfits or what. KOTOKO was average. :| Hiromi Satou's performance was nice.