If you feel the sudden urge to dance like there is no tomorrow, then listen to these three '70s disco classics.

Explore iconic ‘70s female singers who defined a decade. Discover their timeless music, unforgettable voices and lasting ...

But that doesn't mean these albums aren't good or weren't even popular with the most passionate fans. These are the most underrated '70s rock albums that we still can't believe didn't sell more.