a. When something is newly produced as a replica or as an imitation of an older style or form, it is said to be nouveauld; especially when the nouveauld object is in fashion at the moment.
b. When a celebrity who was formerly very popular experiences a resurgence in notoriety, as in a comeback, during her or his advanced years, s/he is said to be nouveauld.
a. Restoration Hardware is chock-full of products that are nouveauld.
b. My favorite nouveauld star is Betty White.