My dad had came home from work early one day to get some sleep before going back in at 5:00. He was getting ready to lay down when he heard music. Not just any music, but female voices singing. He went into the living room and found that the noise was coming from downstairs. He assumed we were home early from whatever reason he didn't know.
So he was going downstairs to check on us, but when he got to the entryway and was about to proceed down the stairs the singing was now heard from the upstairs. He kept going back and forth trying to find out if it was upstairs or downstairs, but by now he heard it from every direction. He decided to just head downstairs to see if we were there and when he got to my bedroom door and pushed it open there were three little girls on my bed, sitting in a circle, singing together. My dad told me that they were speaking in another language because he could hear their voices loud and clear and couldn't make out one word.
When the girls finally noticed him they made a scared face and disappeared into thin air like when you turn the channel on your TV. This whole event only went on for at least 5min. Or so including when he was trying to find out where the voices were coming from. He said the song seemed kind of fancy for today and that they were all wearing old fashioned dresses. One girl had her hair in two pig tails. Which reminds me that I've actually experienced my hair being braided in rolls while I was sleeping and me nor my sister know how to do that. We now hear voices, but have never seen the girls again.