Madonna performed the first show of her Celebration Tour on Saturday, which was postponed due to her recent health scare.

"I didn't think I was going to make it," Madonna revealed to the crowd at the O2 Arena in London, England (via Deadline).

"Neither did my kids, so I woke up with them," she continued.

"I forgot my life, or the five days of my death. But the angels protected me. If you want to know my secret, how I survived, I said, 'I have to be there for my children. I have to stay for my children.'"

In June of this year, Madonna's manager, Guy Oseary, shared on Instagram, "On Saturday, June 24, Madonna developed a serious bacterial infection and will be in the ICU for several days."

"Her health is improving but she is still undergoing treatment. A full recovery is expected.

Oseary explained that this means her tour will have to be rescheduled.

A few weeks later, Madonna herself mentioned her health concerns.

She wrote on Instagram, "Thank you for the positive energy. Prayers and words of healing and encouragement. I feel your love. I am on the road to recovery and incredibly grateful for all the blessings in my life."

She continued. [When I woke up in the hospital, my first thought was of my children; my second thought was that I didn't want to disappoint the people who had bought tickets to my tour. I also didn't want to disappoint the people who had worked so tirelessly over the past few months to create my show. I don't want to let anyone down."

"Right now I'm focused on my health and getting stronger.

I'm very happy that Star is doing better.