pop hip hop indie are three different genres of music. Pop, short for popular music, is noted for its peppy, upbeat sound and a lyrical focus on romantic relationships. Although pop music is thought of by many as sort of insubstantial, no one who has heard ABBA can deny its power in the hands of a skilled practitioner. Hip Hop is a genre built on people using their voices as percussion instruments, rapping over a sample of music. Hip Hop began in New York in the seventies, a sort of bastard child of disco music. Indie rock, descended from New Wave music of the 80s, is the only genre of the three to still depend mostly on guitars. http://www.indi-hop.com