Aaron Kelly shines during 'American Idol' group sing

'American Idol' group sing starts with a pathetic "Lady Is a Tramp," then Aaron Kelly blows us away with his pensive start to "When I was 17" -- why the heck didn't he sing that last night, it totally fits!

They go on with other Frank Sinatra songs, underscoring how poorly his songs translate to groups; they're all written for one guy, up on stage under a bare spotlight.

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