Two things that are totally on-trend this season? Denim and Avicii.

What happens when you pair the two together and throw a big party in San Francisco? An almost instant sell-out! The Macy’s team and Ralph Lauren are teaming up to produce a free Avicii concert in Union Square on September 4th to celebrate Denim & Supply Ralph Lauren’s one year anniversary.

The concert was only announced on Avicii’s Facebook page and the show sold out in just about three minutes. After the dust settled and the Macy’s team checked out their attendee data, they discovered people from 25 countries and 29 states had signed up to attend! Check out the list of attendees with IP address outside of California. It looks like the GRAMMY®-nominated Swedish DJ, remixer and producer even has one fan coming all the way from Sweden for the show!

While visiting the Avicii event page, I loved seeing which of my friends also snagged tickets via our new “See Who’s Going” feature. Luke announced this launch back in May and it’s so convenient to see which one of your Facebook friends will be attending the event before you even grab a ticket!

Miss out on scoring your pair of free tickets? Not to worry! Avicii is the face of Denim & Supply Ralph Lauren’s Fall 2012 campaign, and you can still score a pair to the show with a $150 Denim & Supply purchase at Macy’s Union Square. Hope to see you there! If you want to be in the know of other cool events ticketed via Eventbrite, make sure to sign up for my weekly newsletter.