Luis Fonsi and Daddy Yankee's "Despacito," featuring Justin Bieber, matches perhaps the most vaunted record for a song in the 59-year history of the Billboard Hot 100 chart, as it leads the list (dated Sept. 9) for a 16th week, the most weeks at No. 1 ever for a single. It equals the reign of Mariah Carey and Boyz II Men's "One Sweet Day," which spent 16 weeks at No. 1 in 1995-96.