One of the most diverse talents on the current music scene singer/guitarist Butch Walker is a remarkable roots-rocker in his solo career as well as in-demand producer in the pop realm, working with artists such as Avril Lavigne, Katy Perry and Pink. In short, you never know what you're going to get from him, and he takes the stage at Schubas, 3159 N. Southport, for a three-day residency starting at 9 p.m. Tuesday, Jan. 5, continuing at the same time Wednesday and Thursday, Jan. 6-7, and featuring a set list chosen by fans via Twitter on that final evening. Tickets are $20 a night, and more information is available at www.schubas.com or (773) 525-2508.