Vocaloid!

There is an anime show that is starting to become more and more popular. It is called Vocaloid. Vocaloid involves five "main" japanese characters: Rin, Len, Miku, Kaito and Meiko. They express themselves through songs almost exactly like glee. It is a great show to watch, but I do warn you. The show is in japanese, so you have to read the subtext and they like to sing songs that have a "death" kind of twist on them. Other than that, they are an amazing show!