About the 's

Hello!

  I learned that when I use the apostrophe 's (genitive case) in the last name, it means that the noun that follows it (in this case the word 'music') refers to both names. So concerning to the sentence below(*) the idea wouldn't be that the music is the same music for both groups ?! (what seems strange and wrong). Therefore wouldn't the correct form be: " 'Pink Floyd's and Evanescence's music"(so we understand that the sentence is referring to Pink Floyd music and Evanescence music, which of course, are different, don't we)?   

Please, help me! 

(*) "Pink Floyd and Evanescence's music"

Thank you,

Celine

                    

You are correct in thinking that the 's goes after both names since these are two different artists and the phrase refers to the music each has produced separately.  If two people own something together, then the 's goes only on the last name--for example John and Mary's house, or Simon and Garfunkel's music (they were a pair and produced their early music together).  But if the two people possess different houses, or music, then the 's goes after both.  Pink Floyd's and Evanescence's music, or John's and Mary's houses (if they own them separately).

Thanks for answering me, Clive.

Best wishes,

Celine