The phrase "most headlining" can be replaced with a variety of synonyms depending on the context and tone of the sentence. Some alternative phrases could include "most prominent," "most attention-grabbing," "most noteworthy," "most buzzworthy," "most talked-about," or "most newsworthy." Each of these phrases emphasizes a different aspect of the subject and can be used to create a more specific and nuanced description. For example, "most prominent" may be used to describe a well-known celebrity, while "most attention-grabbing" may be used to describe a shocking news story. Choosing the right synonym can help to create a more engaging and descriptive piece of writing.