Semba is a traditional type of music from the Southern-African country of Angola. Semba is the predecessor to a variety of music styles originated from Africa, of which three of the most famous are Samba (from Brazil), Kizomba (Angolan style of music comparable to Zouk music) and Kuduro (or Kuduru, energetic, fast-paced Angolan Techno music, so to speak).

Barceló de Carvalho, the Angolan singer popularly known as Bonga, is arguably the most successful Angolan artist to popularize Semba music internationally; it generally being categorised as World music.

The subject matter of Semba is often a cautionary tale regarding day-to-day social events and activities, usually sung in a witty rhetoric. Through Semba music, the artist is able to convey a broad spectrum of emotions. It is this characteristic that has made Semba the premiere style of music for a wide variety of Angolan social gatherings. Its versatility is evident in its inevitable presence at funerals and, on the other hand, many Angolan parties.

Semba is very much alive and popular in Angola today as it was long before that country's independence from the Portuguese colonial system on November 11, 1975. Various new Semba artists emerge each year in Angola, as they render homage to the veteran Semba masters, many of whom are still performing.
Source: Wikipedia

Hip Hop (also spelled hip-hop or hiphop) is both a music genre and a cultural movement developed in urban communities starting in the 1970s, predominantly by African Americans.[1] Coinage of the term hip hop is often credited to Keith Cowboy, a rapper with Grandmaster Flash & the Furious Five. Though Lovebug Starski, Keith Cowboy, and DJ Hollywood used the term when the music was known as disco rap, it is believed that Cowboy created the term while teasing a friend who had just joined the US Army, by scat singing the words "hip/hop/hip/hop" in a way that mimicked the rhythmic cadence of marching soldiers.[2] Cowboy later worked the "hip hop" cadence into a part of his stage performance, which was quickly copied by other artists; for example the opening of the song "Rapper's Delight" by The Sugarhill Gang.[2] Afrika Bambaataa is credited with first using the term to describe the subculture that hip hop music belongs to, although it is also suggested that the term was originally derisively used against the new type of music.

Since first emerging in New York City in the 1970s, hip hop has grown to encompass an entire lifestyle that consistently incorporates diverse elements of ethnicity, technology, art and urban life.
Source: Wikipedia