tupa kc rapped with snoop dogg coachella. and michael jackson, not quite in the flesh.onwalking at this year's billboard music awards. hi, david. >> hi, david. >> one of us is real. the other is an illusion. >> an old 19 century magic tr k trick. >> in theory, you could bring anyone back from the dead this way. >> or just have a conversation with yourself. >> but for famous people who died before the digitalage, who can decide whether they should rest in peace? virtual marilyn argues the monroe estate actually does not own her image. >> in fact, virtual marilyn argued in the lawsuit, using mar lun's own words, saying, i belong to the public, i belong to the world, i'm not interested in money, i just want to be wonderful. >> reporter: that wonderful image, a potential gold mine. ♪ diamonds are a girl's best friend ♪ >> reporter: or, in her case, maybe a diamond mine. i'm david wright for "nightline" in hollywood. >> thanks for watching abc news. tune into "good morning america" tomorrow and, as always, we're online at abcnews.com. good night, america. >> yeah! aah! aah!