Place lemon juice in medium bowl. Peel and pit peaches. Slice thinly into bowl; toss to coat with lemon juice. Melt butter in heavy saucepan over medium heat. Add brown sugar and stir until mixture thickens and bubbles. Add cream 1 tablespoon at a time and stir until sugar dissolves and sauce is thick and smooth, about 3 minutes. Stir in peaches, pecans and bourbon. Cook until sauce is heated through, stirring constantly, about 1 minute longer.

Scoop ice cream into bowls. Spoon sauce over and serve.