KnowraBillboard Hot 100Linked fromLinked fromThe 42 pages that link to Billboard Hot 100, each with the reason it gives.All 42Broader topic 3Related 38Compared with 1Record chartBroader topic: Its changing formula shows how a major national chart combines different measures of popularity.BillboardBroader topic: Its signature singles chart turns Billboard's tracking of music popularity into a weekly ranking.Gangnam StyleBroader topic: The song reached number two, a rare peak for a Korean-language track at the time.