Awwww, that one's a really pretty one of her! As for fave *ever*? Oh man....it's a constantly changing thing! I have a ton, but I'll narrow it down to a handful, and you can take your pick of what one(s) you wanna try your hand at, and even ones you don't use, they're still good for reference to learn her features! ^_^
Like I said, I do *not* expect you to use all these, lol!! But they're a reference, and you can sorta get an idea even of her personality and mannerisms even just through the photos
Wow, i think my favourite is the second one from the 60's, or the one you chose as maybe your fave, but, I also love the first one from the 60's she looks so cute!