Aretha Franklin is one of four and the only female.
Madonna
They change every week. The answer can be found at the Billboard site: http://www.billboard.com/bbcom/charts/chart_display.jsp?g=Singles&f=The+Billboard+Hot+100
1
100!
Low was number 1 on the Billboard Hot 100 for 10 weeks.
2001
yeah specially the song Poker Face. it reached number one spot for the US Billboard hot 100 and even hot 100 charts of other countries like Canada and Australia.
Billboard Hot 100 ranks singles popularity. Pop 100 ranks songs popularity.
On the Hot 100 singles chart, it is The Beatles, with 20 #1 hits. Mariah Carey is in second place with 18, followed by Elvis Presley with 17.
2000
Single ladies - Beyonce Womanizer - Britney Spears ... just go to http://www.billboard.com/bbcom/charts/chart_display.jsp?g=Singles&f=The+Billboard+Hot+100
The #1 single on the Billboard Hot 100 on 11 Mar 1972 was Without You by Nilsson.