@akihiro: sorry I haven't any info about the charts you're asking.
@asdf: Britney Spears wasn't even a recording artist when these 2 books were compiled: so no data about her achievements is available. You can always check the "search" tool on top left of this page or simply follow this link
http://italiancharts.com/search.asp@gerti: Madonna in Romy Padovano's book (released early in 1997)
Singles
Feb 1985 - Like a virgin #18/1 month
Jul 1985 - Crazy for you #13/2 months
Sep 1985 - Into the groove #1/5 months
Dec 1985 - Gambler #12/3 months
May 1986 - Live to tell #1/5 months
Jul 1986 - Papa don't preach #1/5 months
Nov 1986 - True blue #4/4 months
Feb 1987 - Open your heart #6/2 months
Sep 1987 - Who's that girl #1/4 months
Nov 1987 - Causing a commotion #4/3 months
Apr 1989 - Like a prayer #1/5 months
Jul 1989 - Express yourself #1/4 months
Oct 1989 - Cherish #3/4 months
Apr 1990 - Keep it together #16/1 month
May 1990 - Vogue #2/6 months
Sep 1990 - Hanky panky #7/3 months
Dec 1990 - Justify my love #3/4 months
Apr 1991 - Rescue me #15/1 month
Sep 1992 - This used to be my playground #1/4 months
Nov 1992 - Erotica #1/3 months
Jan 1993 - Deeper and deeper #4/3 months
Apr 1993 - Bad girl #4/2 months
Jun 1993 - Fever #12/1 month
Oct 1993 - Rain #14/2 months
Dec 1993 - Bye bye baby #8/2 months
May 1994 - I'll remember #2/5 months
Nov 1994 - Secret #4/3 months
Jan 1995 - Take a bow #6/3 months
Apr 1995 - Bedtime story #8/1 month
Nov 1995 - You'll see #7/4 months
Feb 1996 - Oh father #16/1 month
Apr 1996 - One more chance #10/1 month
Albums
Oct 1985 - Like a virgin #1/6 months
Sep 1986 - True blue #1/8 months
Dec 1987 - You can dance #1/4 months
May 1989 - Like a prayer #1/5 months
Jul 1990 - I'm breathless #2/2 months
Jan 1991 - The immaculate collection #15/2 months
Nov 1992 - Erotica #2/3 months
Dec 1994 - Bedtime stories #7/4 months
Nov 1995 - Something to remember #1/5 months
Although a multi-artists soundtrack rather than a proper Madonna album:
Sep 1987 - Who's that girl #2/4 months
Madonna in Dario Salvatori's book (released in the first half of 1999)
Singles
1984 - Holiday #36/4 weeks
1984 - Like a virgin #10/18 weeks
1985 - Material girl #13/19 weeks
1985 - Crazy for you #14/12 weeks
1985 - Into the groove #1/24 weeks
1985 - Gambler #6/19 weeks
1985 - Holiday #30/9 weeks
1985 - Dress you up #21/11 weeks
1986 - Over and over #42/1 week
1986 - Live to tell #1/24 weeks
1986 - Papa don't preach #1/23 weeks
1986 - True blue #4/16 weeks
1987 - Open your heart #4/7 weeks
1987 - La isla bonita #15/14 weeks
1987 - Who's that girl #1/28 weeks
1987 - Causing a commotion #3/23 weeks
1989 - Like a prayer #1/13 weeks
1989 - Express yourself #1/15 weeks
1989 - Cherish #3/20 weeks
1990 - Vogue #1/20 weeks
1990 - Hanky panky #8/13 weeks
1990 - Justify my love #6/12 weeks
1991 - Rescue me #15/4 weeks
1992 - This used to be my playground #1/13 weeks
1992 - Erotica #1/7 weeks
1993 - Bad girl #4/10 weeks
1993 - Fever #10/2 weeks
1993 - Rain #10/6 weeks _ actually listed in 1992 in the book
1994 - I'll remember #2/13 weeks
1994 - Secret #2/8 weeks
1994 - Take a bow #5/6 weeks
1995 - Bedtime story #8/4 weeks
1995 - Human nature #10/3 weeks
1995 - You'll see #4/12 weeks
1996 - One more chance #9/2 weeks
1996 - You must love me #4/1 week
1997 - Don't cry for me Argentina #4/6 weeks
1997 - Another suitcase in another hall #4/1 week
Albums
1985 - Like a virgin #2/49 weeks
1986 - True blue #1/52 weeks
1986 - Like a virgin (Box set) #46/3 weeks
1987 - The first #48/2 weeks _ presumably her debut album
1987 - You can dance #2/20 weeks
1989 - Like a prayer #1/19 weeks
1990 - I'm breathless #1/21 weeks
1991 - The immaculate collection #15/19 weeks
1992 - Erotica #2/14 weeks
1994 - Bedtime stories #2/26 weeks
1995 - Something to remember #1/23 weeks
Soundtrack:
1996 - Evita #2/27 weeks
And that's it. Now I close the Pandora's box I opened. Please don't ask any more data: it takes too much time to type them here and especially in correcting the not so unfrequent errors in Salvatori's book.