There appears to be 2 artist sharing this name:

1) Cuban born salsa singer Monguito aka Ramon Quian aka "El Unico" (The Unique One/The Only One, as he was nicknamed) who reached his peak with the gold selling 1979 SAR records album "yo no soy mentiroso"

2) a current belgian free improv group Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.