Here's a pro-shot video posted about eight hours ago by the good people at Lollapalooza.

It's up-and-coming Austin, Texas, axeman Gary Clark Jr. performing "When My Train Pulls In" yesterday, August 5, at Lollapalooza at Grant Park in Chicago. A different live version of this track can be found on Clark's The Bright Lights EP, which was released last year.

Clark's set was among Lollapalooza's many highlights this year -- and, as the video demonstrates, he certainly did a good job of showing why he's slowly built a reputation as guitar's "next big thing."

For more about Clark -- and to enter a contest to win a guitar -- check out his official website.

And while Clark will be featured in an upcoming 2012 issue of Guitar World, be sure to read our last interview with him right here.