Every so often, music industry executives, artists and fans will say ... music's most timeless eras, here's a list of 25 of the greatest R&B songs of the '90s.

From Bell Biv DeVoe's New Jack Swing sound to Aaliyah's form of Electro-R&B: here are the 19 most influential R&B albums of the '90s and the various movements the respective albums inspired.