Jon Bon Jovi ended a Madison Square Garden concert early on Thursday after appearing to struggle with his vocals during the performance. The incident is notable because it occurred at one of New York’s most prominent venues and prompted another singer to take over part of a key song.

During “Livin’ on a Prayer”, Train frontman Pat Monahan stepped in to sing before the show was brought to an early close. The article describes the interruption as an apparent health setback, although the supplied text does not specify Bon Jovi’s condition or whether further performances will be affected.