Blatter's turning to opera.
Domingo will join 88-year-old former US secretary of state Henry Kissinger and ex-Holland international Johann Cruyff as FIFA's advisers.
Blatter said: "These gentlemen are more or less advisers, they are not the experts but advisers.
"They should be a kind of 'council of wisdom' which my executive committee would not like because they think they are the council of wisdom!
"I have also contacted the Spanish singer... Placido Domingo - he is happy, he is proud that he is part, and Kissinger also.
Placido Domingo People say he is an old man, but he is a wise man."
Blatter also played down the likelihood of FIFA launching an inquiry into Qatar's 2022 World Cup bid but insists he will not block the organisation's watchdog body looking into it.
Blatter also said he has "received enough kicks" and now wants to have the chance to restore FIFA's credibility after being re-elected unopposed as FIFA president last week.
Qatar 2022 came under the spotlight when FIFA secretary general Jerome Valcke confirmed he had sent an email suggesting they had "bought" the tournament but later said he had been referring to the But asked if he would look again at Qatar hosting the 2022 World Cup, Blatter said: "No. I don't know why we should go in - then we shall go to all, then we shall start with Brazil.
"If the ethics committee have the impression that they should do something then let them take the decisions."