There are four main voice types, these voice types are: Soprano, Alto, Tenor and Bass. A famous soprano singer is Jessye Norman. Famous for her alto singing is Fiona Apple. Bruno Mars is a very famous tenor singer. A famous bass singer is Patrick page.
Yodelling is a unique type of singing that includes rapid alternation between the normal voice and falsetto.
Mongolian throat singing is another special type of singing that is based around mimicking that the sounds of nature using your voice.
Whistling is when you only use the back of your vocal chords to sing while in a high pitched voice.