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A twin is one of two offspring produced in the same pregnancy. Twins can either be identical (in scientific usage, "monozygotic"), meaning that they develop from one zygote that splits and forms two embryos, or fraternal ("dizygotic") because they develop from two separate eggs that are fertilized by two separate sperm. In contrast, a fetus which develops alone in the womb is called a singleton, and the general term for one offspring of a multiple birth is multiple...

A celebrity, also referred to as a celeb in popular culture, is a person who has a prominent profile in the media and is easily recognized. Some careers are associated with celebrity status, such as the top tier of the modelling, acting and sports industries...