Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. XHFAJ-FM (better known as Alfa Radio) is a radio station that plays music for teenagers in Mexico City. The station plays music such as punk rock, hip hop, metal, and R&B (English Language Only). Alfa radio began in the early 90s broadcasting electronic music (mostly Eurodance), but it started to lose rating, so it suddenly changed its format and started to broadcast more appealing music for wider audiences. After in the 2001 Alfa Radio came back playing rock, hip hop, metal, R&B and Punk Rock. Alfa Radio is one of the most progressive radio Stations in the area of Mexico City for playing English Radio Edits. The first radio edit that Alfa Radio aired was Gold Digger by Kanye West.Alfa Radio is heard normally by the teenagers of Mexico City.On New Year 2004-2005 Alfa Radio aired Spanish hip hop, Salsa, Reggaeton and Techno Mixes for the New Year''s Eve, That was a temporal format change and it was a strange change for a Urban Contemporary Top 40 radio station.