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QOTSA with Dave Grohl on drums live in Amsterdam more than a month before the "Songs for the deaf" album came out. Dave was amazing, played all the fills without mistakes, even though they played a lot of the songs much faster than on record.
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Elvis Costello live at Paradiso april 15th 2002 doing "I want you" in a breath-takin' live-version. Even singing a part on the edge of the stage without a mic.
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Jeffrey Foucault (with Eric Heywood) live at Blue Highways festival 2006. His style reminded me of the "Ghost of Tom Joad" album by Bruce Springsteen. Here is a singer that took my breath away. This performance was more impressive (to me) than on his album. I was touched.
This weekend I played a few songs of the Blue Highways recording after a long day of recording in the studio. Just to relax and reset my mind... After a few minutes the control room was filled with people, all gathering in front of the speakers to listen. None of these people (rock-dudes

) had ever heard of Jeffrey Foucault, but they were all attracted by his touching performance.
....there must be more...