This was my answer as well.
I picked Monica Bellucci because I have no idea who she is.
ETA: Heh. Ninja’d by Kamino Neko. 
If she were a liberal, it’s highly doubtful she’d say all the evil whacko crap she says.
I went with Betty White on the basis of age. Not that all of the women on the list are spring chickens, but Betty is clearly quite a bit older than the others, from my memory.
My choice was going to be Ellen until I saw Oprah, as all the others besides those got famous at least partially due to their looks. I guess I can leave Ellen out because she used to model, but then the next one down is Rosie.
So I cheaped out and went with Palin.
I do not think this means what you think it means.
Whatever the reasons, it would appear that Ms. Coulter is running away with the votes.
Compare:
View Poll Results: Who is least like the others?
This poll will close on 04-07-2015 at 01:01 PM
Ann Coulter 8 32.00%
Betty White 5 20.00%
Sarah Palin 5 20.00%
Rosie O'Donnell 3 12.00%
Ellen DeGeneres 2 8.00%
Monica Bellucci 2 8.00%
Halle Berry 0 0%
Kate Upton 0 0%
Oprah Winfrey 0 0%
Salma Hayek 0 0%
Voters: 25
View Poll Results: Who is least like the others?
This poll will close on 04-07-2015 at 01:01 PM
Ann Coulter 22 29.73%
Sarah Palin 15 20.27%
Betty White 14 18.92%
Monica Bellucci 8 10.81%
Kate Upton 5 6.76%
Rosie O'Donnell 4 5.41%
Ellen DeGeneres 2 2.70%
Salma Hayek 2 2.70%
Halle Berry 1 1.35%
Oprah Winfrey 1 1.35%
Voters: 74
There are other crazies on the list.
I’m going to go with Kate Upton, because when I think of her I only think of two things. For everyone else it’s a bunch more.
How is Bill Maher on the right? What’d I miss?
Sarah Palin is the only one who was elected to anything.
She and Ann Coulter drive the SDMB batshit, but that doesn’t distinguish them from any other Republican.
Regards,
Shodan
Ann Coulter, because the others are human.
Ann Coulter because she was the one that I thought was primarily an author first, on-screen presence second
Coulter: she’s the only one who hasn’t been in a movie or TV production other than Fox, AFAIK.
Also because she’s an evil cunt.
Kate Upton is the only one known primarily has a model. Others may have modeled at some point in their careers but are better known as either actresses, TV personalities, or for their politics.
Ditto.
Every person on the list is primarily an entertainer by trade, except Sarah Palin, who is primarily famous for being a politician.
I’d disagree with the last part of your sentence. “Infamous”, perhaps, but her short meteoric rise in politics has been overshadowed by her lamebrain antics on Fox and at speaking engagements.
Rosie O’Donnell, because she’s the only one with an apostrophe.
This comparison might suggest that a similar check after 150 or 200 Voters would probably lead to a similar breakdown.
View Poll Results: Who is least like the others?
Ann Coulter 15 30.00%
Betty White 10 20.00%
Sarah Palin 10 20.00%
Monica Bellucci 4 8.00%
Kate Upton 3 6.00%
Rosie O'Donnell 3 6.00%
Ellen DeGeneres 2 4.00%
Halle Berry 1 2.00%
Oprah Winfrey 1 2.00%
Salma Hayek 1 2.00%
Voters: 50
View Poll Results: Who is least like the others?
Ann Coulter 31 31.00%
Sarah Palin 23 23.00%
Betty White 16 16.00%
Kate Upton 10 10.00%
Monica Bellucci 10 10.00%
Rosie O'Donnell 4 4.00%
Ellen DeGeneres 2 2.00%
Salma Hayek 2 2.00%
Halle Berry 1 1.00%
Oprah Winfrey 1 1.00%
Voters: 100