The 38-year-old "I'm Like a Bird" singer regrets snubbing a part as one of the sisters in the 2002 comedy - starring Nia Vardalos and John Corbett - but has says she finds acting very difficult, reported Entertainment Tonight.
"I was supposed to be in 'My Big Fat Greek Wedding'. That was a fail. I was supposed to be one of the sisters or something. Im Portuguese and I can pass as Greek.
"I must have been really busy or something. I don't know what happened! You never know what's what. I don't think I ever read the script," she says.