 During an interview with London 's 95 @.@ 8 Capital FM radio station , Gaga further elaborated on the changes in the show . She said that the show was constructed like a piece of musical theater . It also incorporated a number of contemporary and old musical pieces , some of them being re @-@ recorded specifically for the show itself . A new keytar was constructed for the show and was named Emma . The instrument was created by the Haus of Gaga and the singer said , " We have this new instrument that I brought to the Brits tonight , ' Emma ' , which is what I was playing on the stage . She 's a hybrid from all these other instruments . " During an interview on KISS @-@ FM with Ryan Seacrest , on his show On Air with Ryan Seacrest , Gaga explained that the concert tour was still called Monster Ball , but it had become more of a musical and less of a concert . It had a New York theme at its core ; telling a story where Gaga and her friends traveled to the Monster Ball , but got lost . 
