Is this normal for my 4 yr old??

[madisons_mom]

I have a very active 4 yr old daughter.Here recently she has began talking to herself and even answering back to herself..Ive asked her who she is talking to to,and she says,Peter Pan,or someother name..Sometimes its like she takes on a whole new personality..Someone i dont know..Also when she doesn't get her way,she will give me the most hateful face,and have such a attitude with me...
Im getting very concerned....Any suggestions??

[margypops]

Some children have imaginary friends its quite common and is assert herself,  best to just back off and let it go, the more you make of it the more it will become.