The 1995 Mariah Carey and Boyz II Men single that spent 16 weeks at No. 1 on the Hot 100 was “One Sweet Day.”
The ballad was released as the second single from Carey’s 1995 album Daydream. Carey and Boyz II Men developed the song as a tribute to loved ones who had died, giving it a mournful subject that was matched by its layered harmonies and gospel-influenced arrangement. The collaboration brought together two of the decade’s most successful vocal forces.
“One Sweet Day” debuted at No. 1 on the Billboard Hot 100 in December 1995 and remained there for 16 consecutive weeks, through March 1996. At the time, that was the longest uninterrupted run at the top in the chart’s history. The record was later matched by “Despacito” in 2017 and surpassed by “Old Town Road” in 2019, so the song is no longer the overall longevity record-holder.
The other options are also major hits, which makes the question tricky. “Fantasy” and “Always Be My Baby” were Carey singles from Daydream, while “I’ll Make Love to You” was a Boyz II Men hit—but none matched this collaboration’s 16-week Hot 100 reign.