There are at least two artists with this name:
These are photos from concerts where Duffy played, so they may be of other bands that played the concert as well.
V Festival 2009 Aug 22 - 23, 2009 Chelmsford, England, United Kingdom Uploaded by Peter
Duffy / Andy Bull Mar 26, 2009 Sydney, New South Wales, Australia Uploaded by Sacstracks
The Brit Awards 2009 Feb 18, 2009 London, England, United Kingdom Uploaded by K8 Lnd
V Festival 2008 Aug 16 - 17, 2008 Chelmsford, England, United Kingdom Uploaded by Peter
V Festival 2008 Aug 16 - 17, 2008 Chelmsford, England, United Kingdom Uploaded by K8 Lnd
Virgin Mobile Festival 2008 Aug 9 - 10, 2008 Baltimore, Maryland, United States Uploaded by Andrewshungry
Lollapalooza 2008 Aug 1 - 3, 2008 Chicago, Illinois, United States Uploaded by Kumo
