In the May 2006 issue of GQ magazine, she expressed disappointment in fellow singer Mariah Carey, saying, "She was never cool to me... to the point that one time we were at a party and I think she got really drunk, and she had just really derogatory things to say to me". Carey responded in a press release, "I had hoped that Christina was in a better place now than the last time I saw her, when she showed up uninvited at one of my parties and displayed questionable behavior. It is sad yet predictable that she would use my name at this time to reinvent past incidents for her promotional gain. It is in my heart to forgive, and I will keep her in my prayers". Aguilera then released her own statement claiming, "At this point in my life, I do not want bad energy with anyone. My intentions were not to upset Mariah with any statements that were published or taken out of context. I have all the respect in the world for her."

Especially during their early years as teeny-boppers, Christina Aguilera and fellow Mickey Mouse Club alum Britney Spears are being compared from each other. Though the former claims they were close before (at the show), it seems that the public really wants to put a spark between these two pop princesses. Aguilera, who has proven many times that beefing with Spears isn't true (by giving her children gifts, etc.), insists that she loves Brit and her music.

Christina burst out in 1999 with a debut album that earned her a Best New Artist Grammy and a huge hit single with 'Genie in a Bottle'. However, she was so determined to take more control on her 2002 follow-up, Stripped. Aguilera rolled out a raunchy alter-ego she called X-Tina who writhed around in the soft-core video for the hit single 'Dirrty'. She dissed pop-singing peers Britney and Beyoncé in interviews and frequently found the word 'skank' attached to her name in headlines.

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As we all know, Eminem has slammed Christina in one of his songs suggesting that Aguilera was sexually involved with Carson Daly and Fred Durst. Aguilera called the comments 'disgusting and untrue'. But Eminem said that the lyrics in the song are fictional and not to be taken as true. The two reportedly made peace with each other three years later backstage at the 2002 MTV Video Music Awards, where Aguilera presented an award to Eminem.