These days I remembered that I had (have!) a vinyl LP with a song by The Smurfs. The name of this disc (translated to English) is something like "TV LAND".
Each track was sung by characters, comedians or hosts from 1980s TV shows for kids. One of these tracks is a fully translated (and licensed!) Brazilian Portuguese version of a song called "Smurfing Days".
I even found it on YouTube:
http://www.youtube.com/watch?v=bSSOzeN4Ggg