Ananova:

Britney Spears has slammed Christina Aguilera after the Dirrty singer called her a "lost little girl".

The singer hit back at Aguilera, saying: "I can't believe she said that about me."

She added: "When someone has been rude to you so many times, it's like, 'You know what, Christina, I'm really not about the fake bulls**t anymore'."

According to The Sun, Britney continued her tirade against Aguilera, by saying: "You're scary and I feel really dark when I'm around you'."

In the December issue of Blender magazine, Aguilera said of Spears, "She seemed very distant, even during rehearsals. Every time I tried to start a conversation with her - well, let's just say she seemed nervous the whole time. ... She seems to me like a lost little girl, someone who desperately needs guidance."