Jessica Simpson Just Turned 40 and Is Sparkling With Self-Confidence

Unbelievably, actor and author Jessica Simpson turns 40 today and it’s just now, she says, that she has gained the self-confidence she has craved all her life.

With her recent memoir, Open Book, heating up the book charts, the Irresistible singer revealed a lifetime of pain and struggle to arrive finally to a place of self-acceptance and joy.

Now, on her milestone 40th birthday, Simpson is expressing gratitude for so much.

Jessica Simpson
Jessica Simpson | Chris Weeks/FilmMagic

RELATED: The Romantic Way Jessica Simpson Met Her Husband Eric Johnson Ten Years Ago

Simpson’s ‘Open Book’ was just that – and a huge step in gaining self-confidence

The artist published in February 2020 her memoir, Open Book, in which she, true to the book title, opened up about her struggles with abuse, addiction, and the loves in her life. She wrote on Instagram at that time about the process she went through to finally give a voice to the journals she has kept throughout her life.

RELATED: Jessica Simpson Forbidden From Gaining Weight and 5 Other Bizarre Prenuptial Agreement Rules

“I’m feeling all the feels, so unbelievably blessed, happy and still in shock that this is all happening,” she said. “A lot of people are asking me how I can write a memoir at the age of 39 and I completely thought the very same thing until I started to put all of my journals that I’ve kept since the age of 15 together.”

The mother of three shared her delight in producing the book, which represented her life on so many levels.

“I’ve been very private about most of the hardest moments over the last 15 years,” she continued. “I am finally ready to share my story and life again with an open and honest heart like an Open Book…I have never been more proud of something on a professional and personal combination in my life. It took courage to do this and I can’t wait to be best friends with all of y’all through this phase. Huge anticipated surprises are coming…#openbook.”

The artist wants to raise her daughters to love themselves as they are

Simpson, having experienced intense scrutiny of her body throughout her childhood and career, is eager to help her daughters, Birdie Mae and Maxwell Drew, avoid a life of constant self-doubt.

She told USA Today at her daughter, Maxwell’s, birth in 2012, “My weight has always been something that people like to comment on. I’ve gotten used to it.”

The With You singer added: “Nobody wants to talk about their weight. For me, I have had to come to a place where I am comfortable with myself. I’m a mom now, and get to be a role model for this beautiful little girl.”

Simpson has come to terms with the long-ago pain of rivalry and competition

The now-40-year-old Simpson spoke with ET in February 2020 at the Create & Cultivate conference in Los Angeles about one of the most difficult times in her life: competing against Christina Aguilera and Britney Spears in their Mickey Mouse Club days in the 1990s.

Simpson couldn’t take on at the time Aguilera’s vocal powerhouse and Spears’ dazzling presence. While Simpson made it to the final auditions, she ultimately wasn’t accepted to the popular children’s series. Aguilera and Spears were and it was heartbreaking for her.

Jessica Simpson celebrating her 40th birthday in style

Simpson, now with decades of perspective, has replaced sadness and bitterness with self-acceptance and gratefulness, as she told the outlet.

“[Aguilera, Spears, and Simpson] grew up in a very competitive environment when it came to our record labels and being pushed to do things that were unnecessary for success,” she said. “Everybody has found their own way, in such a beautiful, inspiring way. I just love it that everybody has remained authentically who they are.”

“I think everybody’s careers have their own unique stories, and I love that Britney owns herself, Christina owns herself, and they don’t let the world control them,” she continued. “They just are themselves, and that’s who I am as well.”

RELATED: Jessica Simpson’s Trainer Says She Lost 100 Pounds Working Out Just 3 Hours Per Week