Read More: Amanda Holden makes racy outfit promise ahead of BGT semis And fans were quick to share the moment online. @Neliathemadhouse said: "Just been to see Jeff Beck at Sheffield City Hall, he had a surprise special guest, Johnny Depp!!"@Jdkzn said: "johnny depp just finished his case and he’s in sheffield tonight, what a lad"@OneLoveEarth said: "Johnny is an absolute mad man…leaves court Friday.