Nobody has mentioned that Eminem was born in 1972 & LBG was first released in 1978. It would make it rather hard for LBG to be stolen from an Eminem song.

http://en.wikipedia.org/wiki/Eminem

Regarding Sir Paul the New album (that's it's title) is worth hearing.

Presumably all this hostility towards an artist choosing to collaborate with someone younger won't be directed towards Don Henley whose new album supposedly features a series of collaborations.