In the 1940's and early 1950's, music was smooth and mellow. Vocal artists were known as crooners because they sang softly and emotionally. Their music was calming and familiar. In the middle of the 1950's, rock and roll music was introduced, and the golden oldies era began. It was a wakeup call for teenagers around the globe. This music was anything but soft. It had a predominant beat and was often fast. The artists who performed this new music genre were interested in getting people to move to the rhythm and experience the music. It was a craze that introduced songs still loved and played today by all generations.