Dangerous curves ahead for JESSICA SIMPSON – as she’s smokin’ BIG TIME!

The blonde sex bomb is leaving little to the imagination decked out in red-hot outfits with plunging necklines during recent Hollywood outings.

Friends say Jessica has not only bounced back from the embarrassment of former beau John Mayer‘s boast that she’s "sexual napalm," she’s learned to embrace her sexy new persona.

"Jessica used to be very self-conscious about her curves," a pal told The ENQUIRER.

"She occasionally wore low-cut tops, but she was never one for advertising her natural assets. In fact, she was downright uncomfortable."

The 29-year-old singer, who now stars in the VH1 The Price of Beauty, became even more self-conscious after Mayer outed her as a red-hot sexpot.

The rocker raved about their explosive lovemaking sessions to Playboy, gushing: "That girl is like crack cocaine to me…Sexually, it was crazy."

Jessica initially claimed to be shamed by John’s crude remarks, saying: "It’s more embarrassing. I’ll walk into a restaurant and I notice that more men are looking at me…undressing me."

But Jessica looked proud to be well-endowed in a low-cut dress when she appeared at a Good Housekeeping gala in New York on April 12.

 As her pappa Joe once said: "She’s got double D’s! You can’t cover those suckers up!"

Added the insider: "It took Jess a while, but she’s finally grown into her body. She feels empowered to walk into a crowd and feel all eyes on her.

"Her new attitude is, if you’ve got it, flaunt it!"