Lady Gaga made a surprise appearance on stage at a Semi Precious Weapons gig in London last night (December 15).
The singer accompanied the band on drums during their gig at the Islington Academy 2.
Many female concert-goers stripped down to their underwear when they saw Lady Gaga on stage, according to The Sun.
It is not the first time Lady Gaga has joined the band on stage.
She also appeared crowd surfed during their performance at Lollapalooza festival in Chicago earlier this year.
The band are due to support Lady Gaga at her two gigs at the O2 Arena in London, which begin tonight (December 16). She has told fans that she plans to "blow the roof off" the venue later.
Lady Gaga joins Semi Previous Weapons on stage in London:
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