Singer-songwriter Bret Michaels had to end a concert in New Hampshire after suffering a medical emergency onstage. The singer, who first gained fame as the lead vocalist of the glam metal band Poison, was three songs into his set when he rushed from the stage. Guitarist Pete Evick said that Michaels returned to the stage, telling fans he couldn't continue. "I've never seen a look like the one on his face as if I was a complete stranger" he said. When he went to check on Michaels he said that "he could barely speak, but begged me to apologize to the fans". According to the National Post, a crew member said that Michaels’ blood sugar was extremely low - The singer was diagnosed with diabetes as a child. “The complication of this brutal flu virus and how it has affected his blood glucose levels has been awful to watch” Evick wrote on Michaels’ official Facebook page. “The perfect cocktail of such a virus along with diabetes and a high temperature is to be taken very seriously. “Today even more so than yesterday, it took a team of doctors, friends and family to convince Bret to not return to the stage. He doesn't believe it's the right idea, but those close to him along with all of you I'm sure would rather have him miss one more day and then take the next few days to recover rather than to cause more problems by pushing himself right? From my point of view, most non-diabetics take a week off work when they contract a flu like this, so two days is still pretty crazy. I have no doubt he will be up and running at 100 percent soon. We will certainly be in St Louis next week at Jefferson Barracks Veterans Memorial Amphitheater to continue the party. “Until then, thank you all for your well wishes and support. We've all made sure Bret's received them all and he is both thankful and grateful”.