The former Wilson Phillips singer lost 150lbs after having gastric bypass surgery in 1999 but subsequently regained the weight in the years following the procedure.
Wilson, who recently confessed that she struggles to make healthy eating decisions, has now received lap-band surgery and already lost 30lbs in the weeks since going under the knife.
"It was the right decision for me and I'm doing really well so far. It's all about taking good care of myself," Wilson told People.
In 2010, the 43-year-old insisted that she had come to accept her ever-changing figure and was attempting to appreciate her larger frame.
Wilson Phillips will launch a new reality series entitled The Wilson Phillips Project for the TV Guide network on April 8.