The cause of rocker Bret Michaels' [article id="1637715"]brain hemorrhage[/article] from last week hasn't been discovered, but his return to the stage is already in the works. It's possible that the current "Celebrity Apprentice" contestant could even be back rocking the house by the end of May.

The 47-year-old former Poison frontman has been in the hospital since Thursday, recovering from the hemorrhage (which came on the heels of an April 12 emergency appendectomy), and he most recently was upgraded from critical to stable condition. A statement from his website thanks fans for their continued support and the well-wishes, and also says that the rocker is responding well to tests and treatments.

More information on Michaels' condition is expected to be released on Monday, as he's undergoing tests to determine the exact cause of the rupture.

"While Bret is recovering we obviously have some shows that are being rescheduled. We are working to reschedule dates from now until May 21. At this time we are planning to resume the tour May 26 in Ft. Smith, Arkansas, provided there are no further complications or setbacks," the statement read. "We will then continue with all scheduled dates throughout the summer and fall, including the June and July tour with Lynyrd Skynyrd. Look for additional information in the days and weeks to come."

The statement also told fans who hold tickets to rescheduled shows that theirs will be honored on the new dates.