Jagger performed in with the Rolling Stones on 12 December 2012. The Stones finally played the Glastonbury festival in 2013, headlining on Saturday 29 June. This was followed by two concerts in London's Hyde Park as part of their 50th anniversary celebrations, their first in the Park since their famous 1969 performance. In 2013, Jagger teamed up with his brother Chris Jagger for two new duets on his album "Concertina Jack," released to mark the 40th anniversary of his debut album. In July 2017, Jagger released the double A-sided single "Gotta Get a Grip" / "England Lost". They were released as a response to the "anxiety, unknowability of the changing political situation" in a post-Brexit UK, according to Jagger. Accompanying music videos were released for both songs.