According to the rules of the 2012 Festival Da Canção, Portuguese Television invited the following composers (in bold) to work with the respective singers:
Tó Zé (from Per7ume) with Gerson Santos
Tozé Brito with António Martins da Silva (Tó Martins)
Jony Galvão (from Rosa Negra) with Pedro Portas & Susana Gonçalves
Jorge Fernando with Filipa Sousa
Miguel Gameiro with Pamela Salvado
Armando Teixeira (from Bala) with Vânia Osório
Menito Ramos with Arménio Pimenta
Jorge Cruz (from Diabo na Cruz) with Pedro Tomás
Tiago Dias (from Amor Electro) with Joana Leite
Miguel Majer (from Seda) with Rui Andrade
João Só (from João Só e Abandonados) with Carlos Costa
Nuno Feist with Ricardo Soler
Among the names of the composers we find Tozé Brito who performed Dai-li-dou in the 1978 Eurovision Song Contest in Paris as a member of the band Gemini (main picture). Tozé, a respected musician, also wrote the Portuguese entries in 1982 and 1985.
The national selection for the 2012 Eurovision Song Contest in Portugal, Festival Da Canção, takes place on the 10th of March.