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Marie Osmond, Donny Osmond

Ethan Miller/Getty Images

The show must go on.

Just one day after the private Utah funeral for her 18-year-old son, Michael Bryan, Marie Osmond is set to return to the stage tonight in The Donny & Marie Show at the Flamingo in Las Vegas.

"She's having a rough time, but she's staying strong," the show's producer Chip Lightman tells E! News. "She has seven other children that depend on her, and she's being strong for the kids."

Osmond also has other considerations that are likely playing into her decision...

"She's going back to work because it affects a lot of people when she doesn't work," Lightman tells E! "There's over 100 people who work on the show, and Marie never wants to let people down so she's going back to work tonight."

But Osmond hasn't yet planned to address the family's loss or do any sort of special tribute in tonight's show.

"Nothing has been prescripted, but I think she is going to see how she feels," Lightman tells E! "Marie is the kind of person who goes with the moment.  If she feels that she needs to, she will."

After taking a break from their Vegas act to deal with the death of Marie's son, the Osmonds have added five extra shows April 13-17 to accommodate those who had tickets to the canceled shows.

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Back in the '70s, the Osmonds were one of the original Famous Families.