Yeah! Hey! you're right that it's just like something from the eighties. But I feels more like a parody of something from back than.
More like a cheap copy to me. They don't even have any of the 80's sitcom charm. Full House may not be a great show, and I wouldn't want to watch it again unless you paid me, but it had a charm to it. Ditto Family Matters and stuff like that. I wouldn't want to watch episodes again on a regular basis, but they at least were well done for what they were. These shows seem inorganic, and have an assembly line quality to them. Even (hate to admit it) Lizzie MaQuire and Even Stevens (which was pretty good actually) were'nt this bad.
anyway:
They WERE an 80s band... the show started in 1983.
Exactly. The Chippettes were a 1980's girl band send up, why not pass them off as the same thing before the retro 80's thing falls out?
Though the Chipmunks themselves have been around since the 50's, and they didn't pass them off as a retro 50's group in the film.