Stone Temple Pilots are hitting the road next month with Chester Bennington at the helm. Their new song "Out of Time" is doing OK on rock radio, but the odds are definitely against this working in the long run. For reasons that are very easy to understand, fans want to see bands play with their original lead singers. Bands including Genesis, AC/DC and Black Sabbath seamlessly brought in new singers, but many bands struggle through the process. Journey took decades to find Arnel Pineda, and they still aren't nearly as popular as they were during the Steve Perry days. Here's a look at 15 groups that bravely soldiered on without their frontman. Note: we aren't counting groups like the Doors, Alice In Chains and Blind Melon who hired a new singer after the original died.