Celine Dion: I Can Sing and Execute Wills

Celine Dion is not only a singer ... she's an official administrator of a vast estate.

We've obtained legal docs that make Celine the official administrator of her late husband Rene Angelil's estate, along with 2 others.

The docs reveal Rene left a will, and he was generous to his children, including kids from a prior marriage.

Rene left homes to 2 of his kids from his first marriage ... it looks like both homes are in Canada.

Celine and Rene have 2 vast estates, both of which are up for sale ... a $45 million Florida estate and a $25 million Quebec castle. The will says once the properties are sold, $9 million will go to a trust ... presumably for their 3 children. BTW ... there are other properties as well, which Celine retains.

Celine also gets all the furniture, cars, clothing, jewelry and personal effects. Most of his money goes into a trust ... which typically would provide for the surviving spouse and children.

And one amusing thing ... probate was opened in Nevada. Celine, who's one of the nicest people in show biz, had to declare she's not a felon.