One of the most fearful things that can happen to a band is having to replace their lead singer. After putting in all of the hard work to establish the band, the departure of a singer can spell doom for some acts. But there are a number of instances where the new singer kept the momentum going and, in some cases, even elevated the band to new heights.

While we can get so attached to a singer's voice, we never know what to expect when someone new takes the reigns. In the gallery above, you will find a host of singers who either replaced already legendary frontmen or kickstarted a band's career as we present the Top 25 Hard Rock + Metal Replacement Singers.

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