Pop Music Quiz
Wikipedia maintains a list of musical artists ranked by how many #1 singles they've had on the Billboard U.S. Hot 100 singles chart. Don't search for it right now, because that would spoil this quiz! The list counts group releases separately from solo/duet releases, so, for example, Beyonce would be counted separately from Destiny's Child, but if Beyonce did a duet with, say, Slim Thug, it would count under the Beyonce total (it's just an example; neither she nor her group made the list).
What I would like you to do for this quiz is to guess the artist based on four pieces of information: the number of #1 hits, the total number of weeks at #1, the year of the artist's first #1 hit, and the year of their most recent #1 hit. There are nine artists with ten or more #1 hits.
1. 20 songs, 59 total weeks, 1964 - 1970
2. 18 songs, 79 total weeks, 1990 - 2008
3. 17 songs, 79 total weeks, 1956 - 1969
4. 13 songs, 37 total weeks, 1972 - 1995
5. 12 songs, 32 total weeks, 1984 - 2000
6. 12 songs, 22 total weeks, 1964 - 1969
7. 11 songs, 31 total weeks, 1985 - 1995
8. 10 songs, 33 total weeks, 1986 - 2001
9. 10 songs, 25 total weeks, 1963 - 1986
Note that this is for singles, not albums. Some of these should be a lot more obvious than others. Also note that there was a lot more volatility in the chart in the old days... the average number of weeks at #1 per song gets a lot longer for the more recent artists. Oddly enough, if you study the album charts, you'll notice that the opposite holds true --- albums used to spend longer at the top of the charts but now often only spend a single week at the top.
Post your answers in the comments. Feel free to do research on artists, but for this question, avoid the page that shows this compiled information until after you've posted your guesses. Have fun!
SPOILER WARNING! - Two people have made very good guesses so far in the comments. Refrain from looking at the comments if you don't want a lot of the answers spoiled.
UPDATE (11/8/08) - We have a winner! Check the comments.