Imaginary friend?

Every morning Jade gets her "mommy fix" by comming into my bed after she wakes up to snuggle my hair. Not me. Just my hair. This is an everyday thing. This morning though, as she's inhaling my greasy two-day old unwashed hair, she tells me of her new "friend" Sarah. Aparently, she met Sarah last night in her room, and they were playing together. She even let Sarah sit in her princess chair. (that's a big deal) I asked what Sarah looked like, but she couldn't give me a description. She just said that she's a big girl with a "really bad headache on her cheek". Mmhmmmm. Weird. Jade wants to play with her today too, or..rather, tonight....because that's when Sarah comes to play. I'm guessing she's been dreaming this, hence the "playing at night thing". Jade also said Sarah is sick, but nice, and keeps telling me now she's her new best friend. Okay, here comes the weird, and maybe a little freaky part. I ask her one more time to try to give me a little more of a detailed description of what she looks like. I say "so can you try really hard to remember what Sarah looks like?" Jade points BEHIND me, giggles, and puts her finger over her lips and says "ssshhhhhhh", and laughs hysterically at the wall. I ask "what's so funny?", and again, she laughs, looks BEHIND me at the wall, points to...nothing, and says "sssshhhhh".

Yeeeeaaaahhhhh. I look behind my shoulder, see nothing there, and pick her up, and leave the room. Creepy much??? Oh, and 10 minutes later, Jade's Barney computer which is across the room, and UNTOUCHED decides to start singing. I just looked at it and thought, "That's great. Just great".