Who is Jenna and why is J. Crew sending me her picks?

I frequently get J. Crew email blasts showing me "Jenna's Picks." Knowing that the email will most likely contain several items that I love but shouldn't buy, I usually delete them very quickly. I've always wondered who exactly Jenna is and just learned more about the J. Crew executive creative director from this clip from Oprah. A day in her life looks very fun. As does some time in her closet.