pop latin generally uses a simple, memorable melody and emphasizes the rhythm, often with syncopation, and stripped down to a basic riff or loop which repeats throughout much of the song. Pop songs usually have a verse and a chorus, each with different musical material, well as a bridge connecting them in many cases. The lyrics often concern romance and relationships. The vocal style found in much pop music has been heavily influenced by African American musical traditions such as rhythm and blues (R&B), soul music, and gospel. The rhythms and the sound of pop music have been heavily influenced by swing jazz, rock and roll, reggae, funk, disco, and is currently influenced by hip hop in many cases. Music videos and live performances are often used for exposure in the media, and artists may have extravagant stage shows and use choreographed dance routines. Videos take on a particularly important role in this type of music since it is the most commercially successful one, and videos are an important means of reaching wider audiences.