Jeff Tweedy, the lead singer of Wilco, performs in Lowell, MA on July 11. Though the weather turned sour, it only made the sounds sweeter. Alexander J. Reben May. 9, 2016 Facebook Twitter Reddit Print Jeff Tweedy, the lead singer of Wilco, performs in Lowell, MA on July 11. Though the weather turned sour, it only made the sounds sweeter. Alexander J. Reben