"Fergie: "Oh MADONNA! You know, I saw her after her concert and I wanted to give her some positive words but I didn't want to talk too much to her because I understand what it feels like after a show when there's a lot of people in the room who want to see you. I wanted to give her some kind words but I didn't want to take up her time. I really wanted to ask her some more questions but I doubt it would have been as exciting for her as it was for me! But if I ever got the chance to sit down with her I think I'd want to ask her some advice questions and I would love to collaborate with her. That would be amazing.""

"Ludacris: "Madonna was so low key and so incognito that I hardly noticed her, and when I did it kinda caught me by storm. But honestly speaking, she's a really down to earth, really cool individual. I'm glad I got a chance to meet her – rub some of that energy off!""

"Annie Lennox: "Lo and behold, Madonna's track came back and she'd sung the second verse, which was a huge bonus. I was really touched - for Madonna is very rigorous in what she gets involved in and for her to do that for me, I was thrilled to bits." ."

"Natasha Bedingfield: "I have so much respect for Madonna after learning how hard it is to sing ["Ray of Light"]. She has an amazing voice - the range you need to sing the song is incredible.""

"Pat Boone: "[Madonna's] a talented tart.""

"Stephen Malkmus: "She doesn't seem to run out of ideas, does she. I used to love her when I was 14 or so. I had a regular crush on her. I couldn't swear if it was her music that fascinated me, or the generous cleavage. But yeah, she was hot." ."

"Kim Gordon: "She's strong, beautiful and a manipulator. Qualities which makes her to write great songs.""

"Dave Grohl: "...It could be Madonna, if she wants to come do a couple of shots of Jagermeister with her friend Dave she's more than welcome to come into the room and I'll pour her some chilli shots of whisky, it'll be great!""

"Fran Healy: "I had a massive crush on Madonna when I was a kid, I mean it was huge. It was worrying. I just thought she was amazing.""

"Pet Shop Boys: "Madonna always looks ahead, both for looks and sounds, just like we do.""

"Steve Bray: "If people feel exploited by Madonna - that's resentment of someone who's got drive. It seems like you're leaving people behind or you're stepping on them, and the fact is you're moving and they're not... Madonna doesn't care if she ruffles someone's feathers.""

"Peter Hook: "Madonna's like a Black Widow spider. She tends to use people, then they shrivel up and disappear. She sat there with her back to us, and Rob went up and said, 'We were wondering if you wanted to appear later at the club', and she just went, 'Fuck off.'""

"Don McLean: "Madonna is a colossus in the music industry and she is going to be considered an important historical figure as well. She is a fine singer, a fine songwriter and record producer, and she has the power to guarantee success with any song she chooses to record. It is a gift for her to have recorded 'American Pie.'I have heard her version and I think it is sensual and mystical. I also feel that she's chosen autobiographical verses that reflect her career and personal history. I hope it will cause people to ask what's happening to music in America. I have received many gifts from God but this is the first time I have ever received a gift from a goddess.""

"Tom Meighan: "Ooh, Madonna’s thighs! She reminds me of my old dance teacher, who I used to have a crush on. Who didn’t have a huge crush on Madonna when they were a kid? "I’d marry her. If she came for me, I really would.""

"Marc Almond: "It was a hell-hole. There were prostitutes upstairs, junkies downstairs and it was a bare room with a bed, nylon sheets, and a kitchenette with dirty plates and a lamp. I’ve always felt ashamed she stayed in such a pit. If I’d known in 1983 how big she’d become, I'd have cut up the sheets and sold them on ebay.""

"Eugene Hutz:"

"Susanna Hoffs: "I think she's really great. I respect and admire her and think she's really talented." (From the book "Madonna talking" by Mick St. Michael)."

"Sophie Ellis-Bextor:"

"Damon Gough:"

"Christophe Willem: "In music, the one who has reached the tops, it's Madonna.""

"Timbaland: "Madonna's a funky lady, she's up for everything." ."

"Kylie Minogue: "Madonna's the Queen of Pop, I'm the princess. I'm quite happy with that.""

"Cher: "She could afford to be a little more magnanimous and a little less of a cunt.""

"Liz Phair: "Madonna is the speedboat, and the rest of us are just the Go-Go's on water skis." ."

"George Michael:"

"Justin Timberlake:"

"What impressed me most? Her stamina, dedication and perfection. Her precision and respect for her body and the craft. What an icon! What a role model for women! I bow down to the one I truly serve!!"

"Darren Hayes:"

"Robbie Williams:"

"The Androids:"

"Alice Cooper: "Look at Madonna; she did all the outrageous stuff, but she could sing. She was a great performer! If she got up there and she couldn't sing a lick, I'd go, 'Ok, this is a sideshow.' But, she can really sing.""

"Jon Bon Jovi: "Madonna has been incredibly important to the 1980s, musically... a little disco queen who... became an icon." (1990)."

"Britney Spears:"

"Melanie Brown: "It's easy for critics to knock celebrities who choose to adopt, but it's a good thing that Madonna's doing. Not only is she highlighting the plight of orphans in Africa, she's also giving this little girl the chance of a better life." ."

"Bono: "Madonna should be applauded for helping to take a child out of the worst poverty imaginable and giving him a better chance in life. Baby David is lucky to have been adopted by someone who can give him a chance of survival in this world and I don't think it's fair that people are criticizing her.""

"Ricky Martin: "I know Madonna as a mother, and she’s exemplary, the love she gives her kids is a dream, and I know that her heart is big enough to adopt not just one child but to adopt 20." ."

"Sean Combs: "I'd like to do something with Madonna in Malawi. I see what she does and I think it's fantastic. I'd like to help in any way I can.""

"Beyoncé: "I love Madonna. I do! Definitely. It all works for Madonna. I mean, I couldn’t do a lot of the things she does, but it works for her. I watched the "Human Nature" music video for the "Check On It" video even though it didn't come out anything like it. I wanted to do something like that but we didn't have time to do it because it was just a 12-hour shoot.""

"Ayumi Hamasaki: "I really like Madonna. What I admire is she's made it on her own terms." ."

"Donna Summer: "I was sitting around thinking I should do something. I was thinking about design school. A friend said, 'Are you out of your mind? Do an album.' But I like privacy and I like my space. I like being with my family. You have to be in the right frame of mind. You can't be like 'Don't touch me.' to your fans or saying 'I don't want to sign autographs.' I think I was exhausted for a lot of years. I have to take my hat off to people like Madonna. They keep doing it." ."

"DJ Gordon Edge: "She is very natural. I did not get to know her as a person but she is down-to-earth and straightforward. She just speaks her mind.""

"Daddy G.: "Working with Madonna is something to tell to your grandsons.""

"Lenny Kravitz: "She's a genius, she can do no wrong." VH1 Behind The Music."

"Shakira: "I admire Madonna because she always did whatever she felt like doing. She went through some controversial periods when people rejected her, but she kept on reinventing herself." ."