The England international doubled the Saints' advantage at Craven Cottage yesterday to reach the century of league for the South Coast outfit, which he admits "means a hell of a lot" to him.
He told Sky Sports: "It is special to reach 100 league goals," Lambert said. "I am very, very proud.
"I am glad I have scored it so I can try and score my 101st now. It means a hell of a lot to me.
"It has been the best four-and-a-half years of my life. I have given everything and I will carry on giving everything I can while I am here. I have absolutely loved it."