Shangeri-la

I checked the lyrics of the song, and I found out they are differents songs. The singer of Shangeri-la from the animation Soukyuu no Fafner is Angela, not Kawashima Ai. It seems there is still another song named Shangeri-la, as the ED of anime Hataraki Man. I don't know what it is because I was separated from anime for a long time. I will try to find the lycris of Kawashima's Shangeri-la when I come back today.