Lisa Rinna, 49, showed off her sexy bikini bod in Cancun, Mexico last week -- spending spring break with her kids at the beach-side town's hottest new resort, the Villa del Palmar.

The former soap star, who will celebrate the big 5-0 in July, had something else to celebrate in Mexico -- her 16th wedding anniversary with hubby Harry Hamlin. The couple, along with their daughters Delilah and Amelia, took in all the sites and activities Cancun has to offer, swimming with the dolphins, snorkeling, visiting Mayan ruins and enjoying the resorts various restaurants.

Rinna Tweeted Tuesday: "Loving Mexico ... I don't want to leave!"