How do the four vocalists of Little Big Town respond to the platinum success of the group's most rewarded album, 2012's "Tornado?" Certainly not by playing it safe.
On their sixth album, "Pain Killer," Little Big Town — Karen Fairchild, Kimberly Schlapman, Phillip Sweet and Jimi Westbrook — experiment endlessly with harmonies, arrangements, loops and sound effects. The whistles, odd beats and unconventional guitar work that woozily circle through the first sing...
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