Blogging about celebrities is definitely one of the most niche blogging topics. A celebrity is a person, who has a prominent profile in public and commands some decent degree of public fascination and influence in day-to-day media. The term is often synonymous with wealth (commonly denoted as a person with fame and fortune), implied with great power or popular appeal, prominence in a particular field or many fields, and is easily recognized by the general public.
Celebrity status are commonly associated with various careers within the fields of sports and entertainment; These fields have often produced prominent figures within these two industries.
While people may gain celebrity status as a result of a successful career in a particular field (primarily in the areas pertaining towards sports and entertainment media), in other cases, people become celebrities due to media attention for their extravagant or flamboyant lifestyle or wealth (as in the case of a socialite); for their connection to a famous person (as in the case of a relative of a famous person); or even for their misdeeds (as in the case of well-known criminals).
Celebrities may be known around the world (e.g., pop stars and movie actors), within a specific country (e.g., a top Soccer player); or within a region (e.g., a local television channel news anchor).
People often try to follow the happenings in the life of celebrities and try to imitate their style or deeds and read dedicated celebrity blogs online to find information about these. Blogging either about a single celebrity or multiple celebrities is definitely going to spur a lot of interest in readers and thus bring in more people onto your blog.