¿Metal? spanish singers

All of you didn't believe it when I told you, but it's for real!!!! 
They were metal singers!
Manolo Escobar sang "porrompompero", Death Metal version: https://www.youtube.com/watch?v=cIPk5iLkqaQ

And Fary, too!!! ("Mandanga" Death Metal version) https://www.youtube.com/watch?v=xGGgDWJY7A4

Do not hesitate to write or tell me next day what do you think!