Chapa C is a reggaeton group from Holguin, Cuba. I got this CD from a DJ in Cuba, and I couldn't find almost any information about them on the Internet.
Reggaeton is the caribbean way to hip-hop.
Songs as Emergencia de amor or No me llores are very good and would deserve more attention from the media.
A video of Chapa C is available on YouTube: http://www.youtube.com/watch?v=lqeuVNcXocY