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One Direction At Lollapalooza Might Be The Best Thing We Saw -- And They Weren't Performing

'OMFGG.'

CHICAGO -- There are a few things you can expect to see at any summer music festival: There will be flower crowns in full bloom, endless lines for water or the Porta Potty, and your favorite artists doing insane covers. What you don't expect to see are members of the biggest boy band in the world just ... hanging out on the festival grounds.

But that's what happened on Saturday (August 1), when One Direction members Louis Tomlinson and Liam Payne turned up at Lollapalooza, surprising the life out of fans. While we don't know exactly what shows they hit -- we like to think they were at the Young Thug show rapping along to "Lifestyle" on Friday -- we do know that some elated and very lucky Directioners got to hang out with the guys, and somehow managed to keep their composure long enough to snap pics. Check out a few below.