For nearly 20 years, Mariah Carey and Boyz II Men have held the record for the longest-leading Hot 100 No. 1: the acts, who dominated the charts in the '90s, teamed up for the superstar ballad "One Sweet Day," which reigned for 16 weeks in 1995-96.  Seven other songs share second place with 14 weeks at No. 1 apiece, including one more each for Carey and Boyz II Men and, most recently, Mark Ronson's "Uptown Funk!," featuring Bruno Mars.

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Weeks at No. 1, Title, Artist, Peak Date

16, One Sweet Day, Mariah Carey & Boyz II Men, 12/2/1995
14, Uptown Funk!, Mark Ronson Featuring Bruno Mars, 1/17/2015
14, I Gotta Feeling, The Black Eyed Peas, 7/11/2009
14, We Belong Together, Mariah Carey, 6/4/2005
14, Candle In The Wind 1997/Something About The Way You Look Tonight, Elton John, 10/11/1997
14, Macarena (Bayside Boys Mix), Los Del Rio, 8/3/1996
14, I'll Make Love To You, Boyz II Men, 8/27/1994
14, I Will Always Love You, Whitney Houston, 11/28/1992
13, The Boy Is Mine, Brandy & Monica, 6/6/1998
13, End Of The Road, Boyz II Men, 8/15/1992

The list of singles with the most weeks at No. 1 on the Hot 100 was compiled from the chart's Aug. 4, 1958 inception through the chart dated Oct. 10, 2015.