Singer joins Semi Precious Weapons at O2 Academy Islington

Lady Gaga made a surprise gig appearance in London last night (December 15), joining Semi Precious Weapons on stage at the O2 Academy Islington 2 venue.

The singer played drums while fans danced on stage with the band at the 250-capacity venue – scroll down and click below to watch fan footage of the appearance.

New York band Semi Precious Weapons have supported Lady Gaga at various arena shows over the past year and are set to open for her when she plays the O2 Arena in the UK capital tonight (16).