With a singer like Frank Sinatra (aka Ol' Blue Eyes), it's easy to focus on his treasure trove of hits. His catalog boasts some of the biggest songs in music history, but that doesn't mean everything else is chopped liver. Some of the most underrated Frank Sinatra songs are perhaps some of his best, depending on who you ask, of course. For a singer like Sinatra who has so many hit songs, it's easy for other great tracks to get lost in the shuffle and there's a batch of songs that, for one reason or another, have been overlooked.So what are the most underrated Sinatra songs? Well, this list can include any song outside of his greatest hits (you know those) and that means even singles are fair game. You'll see a number of songs you're familiar with, and others you aren't. But that's the joy of this list. There are so many Frank Sinatra songs, if you think one song is underrated, then add it! Vote or rerank this list to you how deem it to be fit, based on which of these great Sinatra songs you think are the most underrated. If you're a fan of the real Ol' Blue Eyes, let the record show, you voted your way.