I had to chose Save Me... it's pure foot-tapping pop/rock goodness
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I really, really love the misty, ethereal Behind The Mask as well... but it's production verges on cheesy in a few spots. Mainly those monk-like backing vocals during the chorus. Why couldn't those just have been the unadulterated voices of the band instead? The song really is near perfect besides niggly little things such as that. I just adore the acoustic guitar work on this one especially.