Courtney Barnett sang her delightful lyrics in her deadpan style on Wednesday night at Schubas, which was very charming — but what really wowed me was her guitar playing. Early on in the set, she stepped away from the microphone stand and started flailing around with her guitar, her hair hanging down over her face, digging harder into her riffs, while bassist Bones Sloan and drummer Dave Mudie pounded away. As terrific as this Australian’s songs sound on her 2013 record The Double EP: A Sea of Split Peas, they were even more intense and alluring in live performance. This was a Lollapalooza pre-show, and Barnett seemed to be marveling at how much her fan base has grown. Expect her to play a bigger venue the next time she’s in town. And if you’re at Lolla today, make sure to catch her set at 2:15 p.m. (Check out this video of a performance she gave earlier this at the WBEZ studios.)