Sandra Lee tells 'GMA's' Robin Roberts that she has breast cancer

NEW YORK -- Popular TV chef Sandra Lee revealed Tuesday morning on "Good Morning America" that she has breast cancer.

Lee, 48, whose partner is New York's Gov. Andrew Cuomo, said she had a lumpectomy and that her doctors caught it early. She is preparing for a second surgery.

The interview was recorded on Friday but aired on "GMA" Tuesday.

"There's 2 ways cancer beats you up," she said. "Beats up your body, and it beats you up emotionally. And I wasn't going to let it rob me from one day of happiness."

The lifestyle guru opened up to Robin Roberts about her recent diagnosis and how she and Cuomo - have come to terms with it.

"I think he was as stunned as I was," she said. "He's been extremely supportive. He'll be in the operating room with me."

Her diagnosis -- ductal carcinoma in situ, or DCIS -- is the earliest stage of breast cancer and is extremely treatable with lumpectomy and radiation or mastectomy.

"There are lots of different treatment options when you receive a diagnosis of DCIS," Dr. Richard Besser said. "It's very important that women discuss all the options with their doctor, and may want to get a second opinion."

Lee explained why she decided to get a double mastectomy.

"When the lumpectomy was done, they did not have clean margins," she said. "I went back to the radiologist, and she said 'You're going to have to have six to eight weeks of radiation...we suggest you have a mastectomy.' And so I said, if I'm going to have a mastectomy, am I supposed to just get one done? The radiologist and the doctor said 'You're a ticking time bomb.' They both said, 'I would just get them both done.'"

Cuomo's office released a statement saying he was "devastated" by the news.

"After the news what followed was a blizzard of doctors visits, tests and discussions of treatment options," it read. "Sandy is young for her diagnosis, she has no family history, she is healthy and had no symptoms or signals that she was in danger. She has been diligent about going for check-ups and thankfully this was detected in the early stages."

Lee told GMA that her goal is to have the surgery and recover, and then make sure that her siblings and nieces are screened.

New York Mayor Bill de Blasio said in a statement that he and his wife, Chirlane, were keeping the governor and Lee "in our thoughts at this difficult time."

"It takes enormous courage to face a diagnosis like this, and still more to share it in the hopes of helping others. It's a testament to her strength and compassion that she has stepped forward, and we admire her deeply for it. We know their family is strong, and that Sandy will have the all the love, support and good humor she could need in this moment," the statement said.