To marinate, in a large glass bowl or dish, combine the sour cream, lemon juice, Worcestershire sauce, celery salt, paprika, salt, pepper and garlic; mix well.
Add chicken breasts and coat well with sour cream marinade. Cover dish or bowl and refrigerate or marinate for at least 8 hours, or overnight.
Preheat oven to 350°.
Place bread crumbs in a shallow dish or bowl. Remove chicken from marinade and discard marinade. Dredge chicken in bread crumbs to coat well and place in 2 lightly greased 9x13 inch baking dishes.
In a small saucepan or skillet, melt butter and spoon evenly over chicken.
Bake at 350° for 60-70 minutes, or until chicken is cooked through and fork tender and juices run clear.