Alice Cooper has made another surprise performance - he shocked KE$HA fans by joining her onstage in Oslo, Norway on Tuesday night (05Jul11).
The shock rocker stunned fans in Milton Keynes, England over the weekend (02Jul11) by joining the Foo Fighters during their Milton Keynes Bowl gig to perform a medley of songs.
Cooper also shocked fans during his own gig in London last month (Jun11) by inviting Hollywood actor Johnny Depp to join him on guitar.
And now the rocker has made another impromptu performance - by joining Ke$ha onstage for a rendition of his hit track School's Out.
Cooper, who is in the country for his own scheduled gig on Wednesday night (06Jul11), stopped by to see the TiK ToK hitmaker during her soundcheck, before the pair decided to treat fans during the evening concert.
In a post on Twitter.com after the show, Ke$ha writes, "Thanx for coming to Oslo to do 'schools Out' with me dad... Legend. F**KING Legend."
Cooper then replied: "Thanks keshasuxx! Next time our stage, and be sure to bring some bandaids (sic)."
It's not the first time the two stars have appeared onstage together - in October (10) Ke$ha briefly joined Cooper at his Nashville, Tennessee gig.