My winner is Prince by a huge margin - 292 songs. The next closest are U2 at 65, and Colin James at 62.
Mundane and pointless, I know, but it’s about music, so here it is. 
My top ten artists by number of songs:
The Beatles, 217
Steely Dan, 66
Chuck Berry, 50
Beethoven, 41
Ella Fitzgerald, 41
Santana, 39
Mozart, 37
Billy Joel, 36
Stevie Wonder, 35
Heart, 34
Blur tops the list with 160 songs. I don’t know who is second.
I was a huge fan for many years. I… I can’t get rid of them.
Radiohead wins with 326. Below that are:
Tears For Fears, 256
Mesh, 122
Enon, 156
Yoko Kanno, 106
Cherry Poppin’ Daddies, 73
Cat Stevens, 58
Akino Arai, 56
Beck, 41
For those wondering how my top totals are possible, I’m an avid collector of b-sides, live versions and artist’s remixes from my favorite bands. Radiohead have been some prolific mofos from time to time.
1,855 Beatles tracks, out of a total catalog of 22,591 songs. (Prior to their breakup, the Beatles only officially released about 250 songs.)
530 Aerosmith
183 Tom Petty
127 theSTART
104 No Doubt
5009 total tracks.
Those’re just what I assumed offhand (in that order, no less)… where are these stats available?
I just select the ones I see with a really long list (after sorting by Artist, of course), and lift them as if to move them - the cursor tells me how many I just picked up. If there’s a better way to find out, I’m all ears.
160 Blur songs, eh? I guess they’ve done more than just Song 2. 
I export the list to a text file, paste the list into Excel, do Subtotals by Artist, and then sort in descending order.
The Beatles have a commanding lead.
AC/DC, the Clancy Brothers, Dire Straits and the Moody Blues are fighting for second.
What does “do subtotals by artist” mean?
Another way to count is to sort by Artist in iTunes, select the entire artist group (click the first song by that artist, scroll down, and Shift + click the last), then click and drag the whole group. The number of tracks in the group will appear next to your mouse pointer.
OK, I did that. Now how do I get the number totals per artist? Can i sort by quantities?
Some of this has more to do with how CDs are divided into tracks than anything else!..
Wagner - 277
Xenakis - 214
John Cage - 193
Stockhausen - 178
Josquin - 171
Webern - 162
Shostakovich - 155
White Stripes - 154
Scelsi - 148
Captain Beefheart - 130
Ferneyhough - 100
Well, nearest as I can figure (“artist” and “composer” being different categories, but with occasional overlap), it looks like:
Pink Floyd—21
Sarah Brightman—19
Tom Waits—19
Jerry Goldsmith—15
John Williams—13
Rasputina—12
Yoko Kanno—11
Grey De Lisle—10
Johnny Cash—9
Moby—9
John Barry—8
Nick Cave—8
Dead Can Dance—8
Dresden Dolls—8
Garbage—8
U2—8
Vangelis—8
Clancy Brothers—7
Evanescense—7
The Tiger Lillies—7
Cincinati Pops—6
After about there, I don’t think I have more than about five songs from any particular artist.
To quote the Bard, I think that means I test somewhere between “hockey player” and “serial killer.”
The Sea And Cake - 50 songs
The Beatles - 46 songs
Red Hot Chili Peppers - 33 songs
I have a lot of music but lots of scattered albums - not one of those “must have every album” guys.
OK, here’s mine, dug out manually. Dang.
**Prince: **518
**XTC: **361
**Queen: **318
**Ella Fitzgerald: **271
**Nine Inch Nails: **131
**Parliament: **131
**Kirsty MacColl: **97
**PJ Harvey: **97
**Magnetic Fields: **90
**Radiohead: **89
**Skunk Anansie: **86
**Jimi Tenor: **82
**Victoria Williams : **75
**Holly Cole: **73
**Roger Miller: **70
**Queens of the Stone Age: **63
**Super Furry Animals : **59
**Desert Sessions: **57
**Robbie Fulks: **55
**Marilyn Manson: **51
Sorry, it’s probably too late but when I get home from work, I’ll type up step by step instructions.
Oooh, okay!
First off, I don’t really use itunes as my big music player, so I’m counting from windows media player instead. And, here at work, I don’t have my whole music collection on the hard drive, more like a ‘best of’ collection. Here are the artists coming in with more than 18 songs:
Amy Grant 26
Leann Rimes 26
Faith Hill 23
Trisha Yearwood 23
The Corrs 22
She-Daisy 21
Chely Wright 20
Lisa Brokop 20
Mary Chapin Carpenter 20
Reba McEntire 20
Jessica Andrews 19
(Hmm, notice a pattern there? 
)
The Beatles with 107.
after that, everyone goes down dramatically, but I only have 877 songs.
REM 23
Soundgarden 22
U2 20
Nine Inch Nails 20
Dead Kennedys 23
The Cure 16
Sonic Youth 15
Rolling Stones 15
Led Zeppelin 14
Minor Threat 13
The Who 12
Urge Overkill 12
Faith no More 12
Jimi Hendrix 10
These sort of statistics are automatically shown in Winamp, so writing this list was easy. My top 10:
Therion 175
Talking Heads 161
Megadeth 122
Ulver 116
Metallica 106
Lacrimosa 88
Green Day 81
Napalm Death 69
Led Zeppelin 66
Opeth 65