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Just like we figured--not even cancer could keep Sharon Osbourne down.

Ozzy's feisty spouse--who maintains order in a house full of weak-bladdered pets, undisciplined teens and her perpetually wacky husband on MTV's The Osbournes and is known for her uncompromising business dealings off-screen--is "in good spirits and doing well" after cancer surgery last week, her publicist says.

Osbourne spokeswoman Lisa Vega, who initially didn't disclose what type of cancer Sharon Osbourne was battling, revealed Tuesday that Osbourne had been diagnosed and treated for "the very early stages of colon cancer."

"Doctors expect Sharon to make a full recovery," says the publicist. "[She] wishes to thank everyone for their support and kind thoughts over the past week."

Osbourne, 50, went under the knife on July 2, two days before she and Ozzy celebrated their 20th wedding anniversary. She has been released from an undisclosed Los Angeles hospital and returned home.

As a result of the surgery, the first two dates of Ozzfest were postponed. Vega says Ozzy and cohorts will kick off the tour on Wednesday in Scranton, Pennsylvania.

Sharon Osbourne has battled drug and alcohol abuse, but has been sober for years. She recently underwent a gastric bypass operation to shrink the size of her stomach and credit the procedure with helping her lose 90 pounds from her once 224-pound bulk.

Sharon, who is Ozzy's second wife, controls the family's pursestrings. She is credited with revitalizing her husband's career in the 1980s, launching the lucrative Ozzfest summer tour and hatching the idea for The Osbournes, which has already spawned a two-book deal, a soundtrack album and a flood of related merchandise.

She was also the chief negotiator behind the family's reputed $20 million contract for a second season of The Osbournes.

MTV has not commented on how Sharon's surgery will affect shooting. The new season of The Osbournes is still slated to debut in the fall.