There are many more or less significant people who are supporters of Gaga, who have worked with Her or are fans of Hers. There are also many people who are offended by Gaga because they like to be offended about aeveryhting and many not-so-famous-(anymore)-people who claim without any proof that She stole their style or something. In this list I have compiled some of them who has at least some importance (perhaps). Some names remain controversial since they may have been supporters of Gaga before, but then turned their jackets ignobly, and for some people just can't be sure are their behavior on behalf of or against Gaga.
Gaga's supporters in
green, Gaga's enemies in
red and Gaga's former supporters, who became turncoats are in
green and strikethrough.
Rob Fusari, producer of many great Gaga songs, like Paparazzi, and had an affair with Her, but later sued Gaga in hope to get his hands into the millions.
Speedy, a model, Gaga's one time boyfriend
Lüc Carl, a bartender from Nebraska, inspiration of most Gaga's love songs, Her on-and-off boyfriend, currently off, who treated Her badly
Taylor Kinney, an actor and Gaga's current boyfriend who told that Stefani has gone too far with the whole "Gaga-thing".
Joseph Kahn, director of Eh, Eh (Nothing Else I Can Say) and Lovegame music videos, who was supposed to direct also The Edge of Glory, but because of artistic disagreements, left the project and caused that the video wasn't finished properly.
Elton John, singer, father of a child whos godmother Gaga is.
Beyoncé Knowles, Gaga made a single and music video with them.
Pussycat Dolls, a band which Gaga has wrote songs to and performed as a warm up, but they didn't understand Her.
New Kids on the Block, a band which Gaga has wrote songs to and performed as a warm up, but they didn't understand Her.
Semi Precious Weapons a band to which Gaga performed as a warm up and which performed as a warm up for Gaga later, also both have appeared in music videos of each other.
The Darkness a band which performed as a warm up for Gaga.
Lady Starlight, a DJ and go-go dancer, one of Gaga's best friends, who has had a show together with Gaga for a long time.
Marilyn Manson, singer who fell in love with Gaga and has made a remix single with Her.
Brian May, guitarist of the band Queen, who suggested Gaga in the band to replace the late Freddie Mercury. Instead they chose...
Adam Lambert, singer who recorded a song Gaga has written, but was later thrown out of Gaga's Birthday party, since he rampaged drunk and broke things.
Perez Hilton, talentless but persistent climber, who helped Gaga to get famous in the gay community.
Bill Clinton, former president of the United States of America, who had Gaga to perform in his birthday party.
Barack Obama, current president of the United States of America who said it's an honor to him to warm up Lady Gaga.
Cyndi Lauper, singer who made the Viva Glam MAC campaign against aids with Gaga.
Ellen DeGeneres, tv-personality, who loves to have Gaga on her show.
Oprah Winfrey, tv-personality, who has had Gaga on her show.
Barbara Broccoli, Dana Wilson Broccoli, Michael G. Wilson, current producers of the James Bond films, who are big Gaga fans and would like to have Her perform a Bond theme song.
Bradley Manning, Wikileaks informant, former military person and current political prisoner, who used Gaga music to help him spy.
Quentin Tarantino, movie director who is Gagas friend and who offered the Pussy Wagon from his Kill Bill movie for use in Telephone music video.
Robert Rodriguez, movie director who made a film Machete Kills, in which Lady Gaga acts as La Chameleón.
Skrillex, musician who has remixed Gaga's songs.
Giorgia Armani has designed clothes for Gaga.
Karl Lagerfeld has designed clothers for Gaga.
Late
Alexander McQueen, was Gaga's favorite fashion designer and Her supporter.
Christina Aguilera, singer who didn't know if Gaga was a man or a woman, thus causing a certain malicious debate.
Madonna, singer who was an inspiration to Gaga and they both respected each other, but later Madonna suggested that Gaga ripped of her song(s).
Nina Hagen, German punk singer who can't stand Gaga, and claims she's blasphemous.
Nicky Minaj, singer who stole Gaga's style and can't stand people comparing them.
Katy Perry, singer who stole Gaga's style.
Rihanna, singer who stole Gaga's style.
Grace Jones, singer who claims Gaga stole her style.
Roisin Murphy, singer who claims Gaga stole her style.
Bai Ling, actress who claims Gaga stole her style.
Lil Kim, rapper who claims Gaga stole her style.
Timbaland, producer who claims Gaga stole his style (?!?)
Alex Stebbins, actress who claims Gaga stole her boyfriend, which She actually did, 'cos She can, Lüc Carl was that.
Bette Midler, singer who claims Gaga stole her mermaid-in-a-wheelchair style.
Rebecca Francescatti, musician who claims Gaga stole her song.
David Guetta, musician who claimed that he could have made Born This Way album better.
Disabled people, who claim Gaga offended them performing in a wheelchair (!)
Retarded people, who claim Gaga offended them by using the word retarded (!)
PETA, which is against Gaga using fur and meat dress.
Conspiracy theorists, who claim Gaga is part of Illuminati (!)
The catholic church, which claims Gaga to be blasphemous.
Indonesian jihadists, who wants to kill Gaga (!?!)
Hu Jintao, Chinese president who claims the western countries are invading China with Gaga's music.
Yana Morgana, mother who claims that Gaga stole the style and the soul of her daughter Lina Morgana, a singer to whom Gaga wrote a song and who committed suicide at the age of 19.
Justin Bieber, corporate media mascot, who don't understand Gaga and Her art at all.
Selena Gomez, girlfriend of the previous, who mocked Gaga and Her art.
Eminem, rapper, who mocked Gaga in his lyrics, and reportedly will be ruining a song called Street Lights in Gaga's next album, ARTPOP (!)
Die Antwoord, South African rap band which made fun of Gaga, mocked Her art, and refused to perform as an opening act for Her.
The list is not complete and the names are not in any particular order.