[9:31] Jessica Simpson and Eric Johnson
Jessica Simpson and actor Eric Johnson arrive on the red carpet at the annual White House Correspondents' Association Dinner in Washington, May 3, 2014. Reuters/Jonathan Ernst

Jessica Simpson turned up the heat in an all-black look. She wore a little black dress as she stepped out in New York Tuesday. The singer-turned-fashion designer rocked a black dress while running errands in the morning.

The 35-year-old entrepreneur showed off her ample cleavage in a chic long sleeve dress. The plunging neckline had black lace detailing and criss-cross straps tied together.

The outfit ran well below Simpson’s knees, but still showed off her toned pins. The form-fitting dress also flaunted her tiny waistline, E! News reported.

The mum-of-two paired her dress with black ankle strap sandals and matching fringed handbag. The blonde beauty accessorized with lots of gold jewelry including rings, a small chain and pendant set and long earrings. To protect her eyes from the harsh rays of the sun, Simpson wore funky round sunglasses with gold and black rim.

The designer, who is all set to launch her activewear line, kept her long blonde tresses loose and styled straight in a middle part. She opted for subtle make-up for her day time look which consisted of nude lipstick, and a deep brown manicure and matching pedicure.

Later in the evening, she took to the streets with her former NFL player husband Eric Johnson. The former tight-end wore a grey suit and trousers combo. He paired his outfit with a black shirt and completed the look with matching lace-up boots and sunglasses.

The couple held hands as they walked in the SoHo neighbourhood. Simpson looked stunning in black high-waist trousers and a sheer black top. The top featured beaded detailing along with long sleeves and high neck.

Simpson accessorized with her gold jewelry, including a ring bracelet combination, while she carried a black-and-blue box clutch. Her blonde hair was let down and styled into beachy waves.

The designer appeared on the “The Tonight Show” with Jimmy Fallon. Simpson gushed about her two kids Maxwell, 3, and Ace, 2 saying that they were “very smart children.”

The host of the NBC show and the guest shared some light moments when Simpson said that she never takes off her heels. She even brought a photograph of herself jet-skiing with her husband in a pair of heels.

The entrepreneur is in the city to promote her fashion line and has plans to open stores all across the world. Huge billboards have been put up in Times Square with the ad campaign of her label. When Fallon asked her about the subject, Simpson said that she was humbled to be featured on the popular square.