ET learned that Cowell was rushed to the hospital on Saturday, after falling off the electric bike he was testing in his courtyard in Malibu, California. His son, Eric, and brother, Adam, were with him at the time. Cowell was operated on overnight on Saturday, spending six hours in surgery. He underwent a number of procedures and fusions, including having a metal rod inserted in his back.
Cowell is currently recovering in the hospital, where he will spend the next few days. ET has learned that doctors have said it's a bad injury, but Cowell is very lucky.
A rep for Cowell told ET, "Simon has broken his back in a number of places in a fall from his bike whilst testing a new electric bike in the courtyard of his home in Malibu with his family. He was taken to hospital where they operated overnight (Saturday). He's under observation and is doing fine."