El Fenómeno is the major-label debut studio album by American-Puerto Rican reggaeton artist Arcángel, originally released digitally on December 9, 2008, by Machete Music. The album followed the online leak and cancellation of his anticipated underground project La Maravilla, and salvages six tracks from that effort.El Fenómeno is a massive 21-track collection featuring guest appearances by J-King, Don Omar (Química Sustancia), and Tempo (Mi Primera Canción). Produced by a powerhouse roster of urban producers including Luny Tunes, Tainy, Mambo Kingz, DJ Nelson, and Predikador, it's musical style blends reggaeton, urban pop, R&B, and hip-hop, transitioning from romantic slow jams like Pienso en Ti and Por Amar a Ciegas to club bangers like Chica Virtual and Pa' Que la Pases Bien.