COPYRIGHT
Music publishing 

7Rondor Music, which owns the copyright to the Beach Boys classic hit “California Girls,” has sent a letter to Capitol Records demanding that it makes songwriting credits and pay songwriting royalties for the Katy Perry summer hit “California Gurls“. The credits and payments are for Brian Wilson and Mike Love, the writers of the 1965 classic. The two tracks appear quite different but at the end of Perry’s 2010 hit, rapper Snoop Dogg says, “I really wish you all could be California girls” prompting comparison “I wish they all could be California girls” in the Beach Boys’ refrain.
http://www.reuters.com/article/idUSTRE6745S720100805
http://www.bbc.co.uk/news/entertainment-arts-10891016