TaTu is like the dream-band of all adolescent boys:
The girl singers who will actually stop teasing, and show you their boobs, once and for all, in like 3 music videos I think.
It also is entirely fabricated, by business-savvy russians, with a russian lack of scruples
Needless to say, they never enjoyed much fame outside Russia, except for the initial little surprise moment of a "whoa lesbo band from Russia" (they arent lezzers, one of them has a kid)