From this article on Lisa Marie Presley
http://sheknows.com/about/look/5733.htm

<snip> This talented assemblage aside, Presley says she isn't inspired by current popular music -- in fact, she rarely even flips on the radio. "I always listen to old stuff, I don't listen to what's out right now. I'm a big 70s music lover. I love old singer/songwriters -- anything from Gordon Lightfoot to John Denver to Pink Floyd to the Bee Gees to Aretha Franklin," she laughs. "It's like any art -- anything from that period, I love." <snip>

Well she should :D her dad did record Early Morning Rain after all!