Adding to the glamour, the mom of three completed her birthday look with a long black coat, statement jewelry, oversized silver heels, and a sleek black handbag. In the caption, Simpson marked the milestone with a playful nod, writing, "Fancy dive into 45 💫✨💫."

Jessica Simpson stepped out on her birthday with a brand new look. Simpson, who turned 45 on July 10, shared several photos from her celebration at Chateau Marmont on Instagram July 11.

Jessica Simpson pulled out all the stops to celebrate her 45th birthday this week, making sure all eyes were on her. The singer looked sensational wearing a sparkling see-through dress adorned with rhinestones that created a diamond pattern. The daring frock boasted large cut-outs across her toned waist and exposed her long, lean legs.