Christian and Satine fall in love , while Zidler struggles to keep the Duke interested in the musical `` Spectacular Spectacular '' even though Satine has not yet slept with him .
Satine initially mistakes Christian for the Duke , and soon learns that he is just a writer ; but by this time Christian has already fallen for her ( `` Your Song '' ) . The Duke interrupts them ; Christian and Satine quickly feign that they were practicing the lines for the Moulin Rouge 's next show , `` Spectacular Spectacular '' , and with the help of Zidler , Toulouse-Lautrec , and the rest of the troupe , they pitch the show to the Duke with an improvised plot , about an evil maharajah attempting to woo an Indian courtesan who is in love with a poor sitar player ( `` The Pitch ( Spectacular Spectacular ) '' ) .