MJ's nephews, Tito Jackson's sons. I love 3T. I went to see them live back in '96, I got their album and all the singles from that album.
They released a second album independantly in Europe, they've been promoting it in France, Germany, etc. I haven't seen it in shops over here though, although I did see a single off the album.
I have the whole of the new album on MP3 though, it's really good.