Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Josh Groban in a bad evening

First of all, I'm a huge fan of Josh Groban's. Having listened to all his albums and watched all his DVDs, I got disappointed about Live At The Greek. Unlike many reviewers, the flashes, lights and the rock n'roll atmosphere didn't bother me, at all. The main problem, in my opinion, was his strained and nasal voice, which messed up with a lot of beautiful songs. "Mi Mancherai", "Caruso" and "Alla Luce del Sole" were just unrecognizable. It seems that he was congested and couldn't sing that day, but wasn't able to postpone the performance. Luckily, I've borrowed the DVD and haven't bought it. However, I must acknowledge that he sang beautifully in some parts of the concert. "Oceano", "Remember When It Rained", "My December" and "Never Let Go" were great. The setlist was simply the best of all his concerts. Sorry he wasn't able to make it work that evening.