Madonna kicked off her career-spanning Celebration Tour at London鈥檚 O2 Arena on Saturday night, marking her first performance since suffering what her manager called a that led to hospitalization in an intensive care unit for several days back in June.

鈥淚鈥檓 on the road to recovery and incredibly grateful for all the blessings in my life,鈥� the pop superstar on Instagram this summer, shortly after news of the ICU stay broke. 鈥淢y focus now is on my health and getting stronger and I assure you, I鈥檒l be back with you as soon as I can.鈥�

On stage, Madonna, 65, said she鈥檇 had a 鈥渃razy year鈥� that neither she nor her doctors thought she鈥檇 make it through. She said her children spurred her on and that she had to 鈥渟urvive for them.鈥� The opening night of the tour also marked the 27th birthday of daughter Lourdes Leon, who appeared on stage with her mother.

After a brief technical hitch, the opening night of the tour was indeed a celebration. Madonna played songs from across her vast career, including studio recordings and footage drawing on four decades of hits. On the set list were iconic songs from 鈥淟ike a Prayer鈥� to 鈥淗oliday鈥� to 鈥淰ogue鈥� to 鈥淟a Isla Bonita.鈥� She also included more niche tracks such as 鈥淒ie Another Day鈥� from the 2002 Bond movie of the same name.

During an acoustic moment in the show, Madonna spoke out about the ongoing .

鈥淓ven though our hearts are broken, our spirits cannot be broken,鈥� she said, adding that she hopes for a 鈥渃ollective consciousness to change the world and bring peace.鈥�

Madonna rescheduled the North American leg of her tour, originally slated to kick off July 15 in Vancouver and run through Oct. 8 in Las Vegas. That leg now begins Dec. 13 at Barclays Center in Brooklyn, New York, and runs through April 24, 2024, when it will conclude at Mexico City鈥檚 Palacio de los Deportes.

Sian Watson, The Associated Press