His first major hit (and Kaos' first release) was "Não", a track that sampled vocals from a Xutos & Pontapés track, released under the alias Doctor J.
Luiz Inácio Lula da Silva | Aníbal Cavaco Silva | Rui Costa | Wanderlei Silva | Marina Silva | Thiago Silva | Marina Silva | Thiago Silva (footballer) | Sullivan Silva | Joke Silva | Giant Silva | Cao Rui | Aravinda de Silva | Silva | Giovanni Silva de Oliveira | Eduardo Da Silva | Clarence Richard Silva | Assuerio Silva | António José da Silva | Zhu Rui | Washington Roberto Mariano da Silva | Walter de'Silva | Silva, Missouri | Silva Jardim | Silva compass | Shavendra Silva | Rui Faria | Rogério Dutra da Silva | Nikki Silva | Miguel Otero Silva |
Underground Sound of Lisbon (sometimes shortened to USL) was a collaboration between Portuguese house music producers Rui da Silva (then known as Doctor J) and DJ Vibe (real name Tó Pereira).