Donna Loren was the Dr Pepper Girl in the sixties. In fact, she was the ONLY Dr Pepper girl! She also appeared in several of Frankie and Annette's BEACH PARTY films as well as in a memorable role as Susie the corrupt cheerleader on a 1966 Joker episode of BATMAN! I had the great pleasure to interview Ms. Loren a couple of years back. A delightful and talented lady who has recently started singing publicly again. Here's a link to our talk:
This clip is from Milton Berle's failed, short-lived attempt at a comeback variety series in '66, on which Donna was a regular.