That depends on what country and chart you're talking about. In the U.S., according to Billboard magazine, it was Puff Daddy, in various combinations, with three #1s. But the act on the chart the longest with one single was Elton John, #1 for 14 weeks with Candle in the Wind b/w Something About the Way You Look Tonight.
After that it was:
Puff Daddy & Faith Evans - I'll Be Missing You (11 weeks)
Puff Daddy featuring Mase - Can't Nobody Hold Me Down (6)
The Notorious BIG with Puff Daddy and Mase - Mo Money Mo Problems (2)
Sugar Ray - Fly (6)
Spice Girls - Wannabe (4)
Will Smith - Men in Black (4)
Mariah Carey - Honey (3)
The Notorious BIG - Hypnotize (3)
Hanson - MMMBop (3)
Boyz II Men - 4 Seasons of Loneliness (1)
an orchestral group im guessing
The Supremes
RBD
"Daft Punk" is a very popular music group. One of their top hits, "Technologic," was released on June 14, 2005. "Technologic" was one of the group's most successful songs.
Mariah Carey
The Carpenters
The group Dru Hill are most famous for releasing music of R&B, soul and Gospel tracks. The group originates from Baltimore and had several hits in the 1990s.
an orchestral group im guessing
their music
The Beatles
The Supremes
Ronny Milsap
RBD
Ac/dc
"Daft Punk" is a very popular music group. One of their top hits, "Technologic," was released on June 14, 2005. "Technologic" was one of the group's most successful songs.
Patsy Cline
Mariah Carey