Looks like Jessica Simpson isn't the only person who thinks her sister has a hot body. Rob Shuter, Ashlee's publicist, has confirmed that the diva was approached about posing for Playboy ... in the nude!

The price of this offer? A whopping $4 million! On tour, promoting her latest album, "I Am Me," Ashlee reportedly turned down the offer.

Good thing. It's hard to believe Papa Joe Simpson would approve of his youngest daughter shedding it all in public. It would've been quite the opposite career angle as taken by Jessica and her virginity.