how did it performed on the charts?
The song remained at the peak for a record-breaking 16 consecutive weeks, from December 2, 1995 to March 16, 1996.
One Sweet Day
The song remained at the peak for a record-breaking 16 consecutive weeks, from December 2, 1995 to March 16, 1996. 
mariah carey and i know you're shining down on me from heaven UNANSWERABLE what is  "one sweet day"? It is a song by American singer Mariah Carey and R&B group Boyz II Men
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One Sweet Day [SEP] Chart performance
"One Sweet Day" became Carey's tenth chart topping single on the "Billboard" Hot 100 and Boyz II Men's fourth. The song remained at the peak for a record-breaking 16 consecutive weeks, from December 2, 1995 to March 16, 1996. It remained the only song to stay at number one on the chart for 16 weeks until 2017, when the record was tied by Luis Fonsi and Daddy Yankee's "Despacito", featuring Justin Bieber. The record would remain until Lil Nas X's "Old Town Road", featuring Billy Ray Cyrus, broke the record in 2019, spending nineteen weeks atop the "Billboard" Hot 100.