Aerosmith has canceled four shows in order to allow singer Steven Tyler to rest and recover from unexpected medical issues, according to Rolling Stone.

While the nature of Tyler's medical issues have not been disclosed, a reassuring statement from the band states, "Steven is expected to make a full recovery, with proper rest and treatment he will be back on his feet soon, rocking the world."

Tyler added some reassurance of his own, sharing a message with his fans affected by the cancellation.

"To everybody in South America — Brazil, Chile, Argentina, and Mexico — I'm very sorry and feel like I've let you down. I won't be able to continue the last four shows of this tour. I flew back to the U.S. on doctor's orders last night after the show in São Paulo.

"Please not to worry," Tyler continued, "I am not in a life-threatening condition, but I need to deal with this right away and get some rest and medical care immediately in order to sustain and maintain my future performances. I promise I'll be back. Unfortunately, health does not wait and it's something even I can't schedule around our shows. As they say, 'We humans make plans, and God laughs.' I love you all and will be back with you soon."

Other members of the band stayed in Brazil, signing autographs and taking photos with fans to show their appreciation

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