See a new picture of Jessica Simpson showing off her major cleavage and slim body in a red Carolina Herrera dress on the red carpet in New York City. Credit: Michael Stewart/Getty Images

Sexy Simpson! Jessica Simpson looked smoking hot on the red carpet in New York City on Tuesday, Dec. 3. The 33-year-old mother of two showed major cleavage in a form-fitting red dress to attend the 27th annual Footwear News Achievement Awards at the IAC building.

Simpson flaunted her slim post-baby body for photographers just fives months after welcoming her second child, son Ace. The former Fashion Star mentor look glam in the knee-length, red-and-black floral print Carolina Herrera dress, which showed off her narrow waist. She accessorized the look with black Casadei pumps, Lorraine Schwartz jewelry and a black Giorgio Armani coat. Simpson also wore her long blonde hair down and styled smokey eye makeup. 

The Texas native was joined at the event by fiance Eric Johnson. An onlooker tells Us Weekly that the 34-year-old former NFL player patiently waited on a nearby couch while Simpson posed for pictures. 

The couple and their two kids -- Maxwell, 19 months, and Ace, 5 months -- celebrated Thanksgiving together in Boston with Johnson's family. "Eric is such an amazing dad. She completely trusts him and has all the confidence in the world with him as a dad," a source told Us Weekly. "She loves Eric's family and is really excited to bring both kids back east and spend Thanksgiving with them."

Tell Us: What do you think of Simpson's red carpet look?