--Among other things musicians can be influenced by, this one is at least (and some would add: unfortunately ;) still legal.

Years ago, Yes acknowledged that the opening of their classic song 'Yours is no Disgrace' came straight from the theme song from the TV show Bonanza. Later in the same song, there's some guitar work from Steve Howe that sounds very similar to some guitar work from Wes Montgomery. [and i'm fine with that]

Kevin