I believe that Vivian's interview will be on the show this weekend, according to etonline.com

Yes, I saw the profile on Vivian Vance this weekend. I did not know that Lucille Ball did not want Vivian on the show initially. Apparently Lucy was very insecure about Vivian's beauty, so much so that she had a clause written in her contract which stated that she must be 20 pounds heavier than Lucy during the duration of the show.