06/26/2010 05:12 am ET Updated May 25, 2011

Bret Michaels Felt Like He'd Been 'Hit With A Baseball Bat'

As Bret Michaels continues to be watched closely by his doctors, a source reveals the rocker's excruciating moments before he was taken to the emergency room.

According to the source, Michaels, 47, said the headache that prompted him to call for an ambulance felt "like [getting] hit in the head with a baseball bat over and over again."

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