The 42-year-old singer and her husband, Rene Angelil, also have a 9-year-old son, Rene Charles.
"Celine first announced the upcoming new additions to the Angelil-Dion family back in May, and now she just revealed that she is expecting twin boys," the Web posting said. "Congratulations to the happy family!"
Aaron Carter is still in love with Hilary Duff
Ray Liotta sues skin care company over use of likeness