Against Me! leader Laura Jane Grace had an appearance scheduled at Lion Records in London yesterday (Aug. 2), but when she realized a sizable portion of the crowd wasn't able to make it into the at-capacity store, she took her act out on to the street.

Surrounded by a crowd of fans shouting along, Grace performed an acoustic version of “I Was a Teenage Anarchist” from Against Me!’s 2010 full-length, White Crosses. She even received some backup from a fellow busker about halfway through. See for yourself in the video at the top of the page.

Against Me! are currently on tour in Europe. They’ll return to the states on Sept. 11, when they’ll perform at this year’s Riot Fest in Chicago. From there, they have dates scheduled through the end of the September. Get more information at the band’s website.

The Florida-based punks are set to release 23 Live Sex Acts live album on Sept. 4, which features performances from their 2014 world tour. Check out the tracklist right here.