Watch: 'Nobody Really Cares if You Don't Go to the Party' Live Show in London Tube Station

The signs began popping up around the globe.  Giant, teasing signs in London, New York, Los Angeles, Melbourne, and Sydney. That inevitably led to people shooting selfies and sharing on social media.

Then last week, Australian indie rocker Courtney Barnett — which Out called 'the new bard of rock,' hailing her debut album, Sometimes I Sit and Think, and Sometimes I Just Sit, 'as self-assured a debut as you could wish for — performed a guerilla set for the new single, "Nobody Really Cares If You Don't Go to the Party," during an unannounced live set outside Camden Town tube station in the heart of London.

Check out the rest of her tour dates here or below:

WORLD TOUR DATES

8.21.15 - Pukkelpop - Hasselt, Belgium
8.22.15 - Lowlands 2015 - Biddinghuizen, Netherlands
8.23.15 - Green Man Festival - Wales, UK
10.20.15 - Hollywood Bowl - Los Angeles, CA *
10.21.15 - The Fillmore - San Francisco, CA
10.23.15 - Madison Square Garden - New York, NY *
10.29.15 - Club Quattro - Umeda, Japan
10.30.15 - Liquid Room - Shibuya, Japan
11.05.15 - Bodega - Wellington, New Zealand
11.06.15 - St. James - Auckland, New Zealand
11.07.15 - Foundry - Christchurch, New Zealand
11.21.15 - Postbahnhof am Ostbahnhof - Berlin, Germany
11.23.15 - Bürgerhaus Stollwerck - Cologne, Germany
11.25.15 - The Forum - London, UK
11.26.15 - The Forum - London, UK
11.27.15 - Wulfrun Hall - Wolverhampton, UK
11.29.15 - ATP Festival - Prestatyn, UK
11.30.15 - The Ritz - Manchester, UK
12.01.15 - O2 Academy - Liverpool, UK
12.02.15 - O2 ABC - Glasgow, UK
12.04.15 - O2 Academy - Bristol, UK
12.05.15 - Gaite Lyrique - Paris, France
12.28.15 - 12.31.15 - Falls Festival - Australia
01.07.15 - Astor Theatre - Mount Lawley Wa, Australia
01.08.15 - Southbound Festival - Busselton Wa, Australia
01.16.15 - Enmore Theatre - Newtown, Australia
01.22.15 - Palais Theatre - Melbourne, Australia