Niki Taylor pregnant with baby No. 4

LOS ANGELES, May 18 (UPI) -- U.S. model Niki Taylor announced via Twitter Wednesday she is pregnant with her fourth child.

People.com said the former "Celebrity Apprentice" contestant posted an ultrasound image, then a photo of her kissing her husband, NASCAR driver Burney Lamar, as he holds their daughter, 2-year-old daughter Ciel.

"YES!! We are expecting our fourth child! So happy and blessed!" she wrote in the message.

Taylor, who has twin 16-year-old sons from a previous relationship, and Lamar have been married for more than four years.