Dream

Q: Who Is/Are Dream?

Dream is a trio of young girls who sing (and one of them has composed a couple of their singles) very popular dance club style songs. Their songs are very catchy. Part of their popularity is also attributed to their well-choreographed dance steps featured in their videos.
Their names and other vitals will be forthcoming.

Q: Where Did They Come From?

Apparently, AVEX, a popular record or production company, sponsored a contest for a new all-girl group, in a contest called "Dream 2000", or something like that. These three girls were the winners.

Q: Why Do You Like Them?

They're cute (kawaii), their first batch of songs are catchy, and their choreography is a nice gimmick. Once I found out that the oldest girl (I think she's 19) actually wrote a couple of their songs, I also gave them more credit.
Once you watch them for a bit, each one has a distinct look and characteristic, and sound in their voices.
They also sing fairly strongly (i.e. loud).

Q: Anything Else of Note?

Since all of their songs are club-style songs, almost all of them have several remix versions out there. Their sole album out thus far is a collection of their "Eurobeat" mixes, with a few others thrown in for good measure. I just ordered a copy, so I'll report later how it is.