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Jessica Simpson is bringing the heat.

The 45-year-old actress and singer posed in lingerie to announce the launch of her new line of intimates.

"When I’m wearin’ somethin’ sexy underneath, my days and nights are always filled with a secret surprise 😜," she wrote in the caption. "Everyone deserves to feel confident and beautiful! This is one of my best kept secrets that I am now happy to be sharin’ with y’all. Introducin’ the poetry of my wardrobe...my new line of @jessicasimpsonstyle brassieres and knickers at @walmart !!!"

In the announcement post, Simpson can be seen wearing a black lace bra with black and white detailing on the straps and matching underwear. In addition to a large blue ring, the singer also accessorize

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