@Absolved - I'm not sure if I can rely on your judgement when it comes to finding similarities and reused concepts in the work of different artists. I was doing my homework just to see if these claims your making are legitimate.

Janet's 'All For You' and Madonna's 'Bad Girl' single covers are quite different. Only Madonna's upper body is visible and she's smoking a cigarette. Janet's entire body is on the cover and she's hugging a pillow. The only common denominator here is that their both semi nude. One looks like , come fuck me and the other is probably up to no good.

As for Janet's LWNDWY and Madge's Cherish backgrounds being similar - I again, I beg to differ. One is on the beach splashing around in water and the other in the middle of a dessert. What's similar here - the blue skies? Janet's wearing a halter top, some blue jeans and has a love interest. Madge is wearing a fitted black dress, surrounded by water and is accompanied by a child & several men.

Janet's 'Every time' and Madge's 'Power of Goodbye' - Janet's gives off an illusion that appears to show off her fully nude body. She's swimming in water throughout most of the video. Madonna's fully clothed, playing chess and has a love interest. I figured out what these clips have that's similar - blue lighting!

I'll stop here, but I don't think I see your case at all. Janet's worked with Justin first, but I would not say that gave birth to '4Minutes' (although I wouldn't throw that notion out the window). Some of your references are really loosely based comparisons.

Also for the record, Madge and Mariah's pics have a lot in common - it's 3 images of them, wearing a long shirt that reaches their mid thigh. I'd say that's a lot right there.