The top 10 neighbors span five distinct subcategories — Musicians and Bands, Lifestyle, Tech Personalities, Athletes, and Actors — with no single kind dominating the set, which is the defining structural fact of Niall Horan's audience shape.

Similarity here measures how closely two entities' audiences resemble each other in composition. The three highest scores all belong to fellow Musicians and Bands: Louis Tomlinson at 0.99, Liam Payne at 0.97, and Michael Clifford at 0.96. That cluster is expected — shared fan-base history pulls those scores to the top. What makes the shape broad is what follows. Cameron Dallas (Lifestyle, 0.95) and Markiplier (Tech Personalities, 0.95) sit nearly as close as the musicians, and Calum Hood (0.94), Connor Franta (Lifestyle, 0.94), Steve Austin (Athletes, 0.93), Austin Mahone (Musicians and Bands, 0.93), and JC Caylen (Lifestyle, 0.92) round out the ten with scores that remain tightly bunched across very different kinds of entities. Three of the top 10 are Lifestyle creators, two are Musicians and Bands outside the One Direction orbit, one is a Tech Personality, one is an Athlete, and one is an Actor — a spread that signals no single community owns this audience shape.

The broad distribution across subcategories indicates an audience that overlaps widely with mid-2010s internet-native fanbases rather than clustering tightly around any one genre or format.