GENRE

"Music can be divided into many genres in many different ways. These classifications are often arbitrary and controversial, and closely related styles often overlap. Many do not believe that generic classification of musical styles is possible in any logically consistent way, and also argue that doing so sets limitations and boundaries that hinder the development of music. While no one doubts that it is possible to note similarities between musical pieces, there are often exceptions and caveats associated. Labeling music with genres often do not reflect a specific culture, race, or time period. Larger genres consist of more specific subgenres."

There are many different "Types" of music, which are then put into genre's. A song can not always fit into a certan genre, it can better labeled as a type of music, because when the beat or pase of the song has been changed, the genre can be completely different - for example you can have two songs which are exactly the same, but when two different types of artists sing the same song, the genre is different, one could be house music and the other country, but the type of song will still have the same meaning.

Example's of "types" of music 
 Acapella - any singing performed without instrumental backing
4x4 Garage - UK garage also known as Bassline
Bakersfield sound - gritty, hard-edged reaction against 1950s pop country
Dance-pop - contemporary form of dance music with pop music structures
Death/Doom- a fusion between death metal and doom metal
Electronic luk thung - Dance-ready form of Thai pleng luk thung
Funk metal - 1980s combination of funk, heavy metal and punk rock

Examples of genre
Rock 'n' roll (1950s) - Chuck Berry, Buddy Holly, Elvis Presley
Rock (1960s) - Beatles, Rolling Stones, Who, Creedence Clearwater Revival
Rock (1970s) - Led Zeppelin
Americana - Dave Alvin, Neko Case, John Hiatt
Emo - Death Cab for Cutie, Dashboard Confessionals
Country - Hank Williams Sr., Patsy Cline
Jazz - Duke Ellington, Count Basie, Louis Armstrong
Big Band - Glenn Miller, Tommy Dorsey
Pop vocalists - Frank Sinatra, Ella Fitzgerald, Tony Bennett
Blues - Robert Johnson, Bessie Smith
Folk - Woody Guthrie, Pete Seeger
Reggae - Bob Marley, Toots & the Maytals
Soul - Sam Cooke, Aretha Franklin, Otis Redding
R&B - Ray Charles, Etta James
Celtic - the Chieftains
Rap - LL Cool J, Run DMC
Hip-hop - Lauryn Hill