(Photo: CBS) Tamara Rabi is a city girl raised Jewish. Adriana Scott is Catholic and raised in the suburbs. But they have many similarities in spite of growing up in different homes. They're both night people, they both love to dance, they both want to have a boy and a girl (in that order) and they both use Pantene shampoo. They're both "B" students, even though Tamara attended a top private school and Adriana went to public school. And the subject that gives them both the most trouble? Math. They look remarkably alike, but they're not exactly alike. Tamara has a birthmark over her right eyebrow. And Adriana had braces for five years. Plus, Tamara says she's a little more outgoing than Adriana, who admits she's a very shy person. Segal, however, says it's a scientific phenomena that Adriana and Tamara act alike and even dance the way they do: "All of us are comfortable in certain ways because of the way our bodies are made. And if all of us had identical twins, they'd be sitting exactly as we are."