Is it a dream ?

Non-Lucid part:
I'm in my house. Walking from the living room to the kitchen. I pass by my sister and my cousin that are going in the opposite direction.
When I say my house, I mean the house of my parents, the one from where I moved out 2,5 years ago.
I'm in the kitchen and a song called "Meu Universo" from a brazilian singer known as PG starts to play very loud in there.
I start to look from where the noise is coming from and find that it's coming from my dad's cellphone that is over the refrigerator.
I think "This cellphone doesn't play MP3, I must be dreaming"
He has a Motorola W220 since the cellphone arrived in that tiny city.
Before I make a RC to confirm that I'm dreaming, my sister appears and calling for me and I go.

I have to add that I tried to explain about the RC's to my family and they think that it's a little crazy to "ask if I am awake".
They usually say that they always know if they are awake (even during the dreams, they "know that they are awake" xD).
So sometimes I feel embarassed of doing a RC in front of anyone of my family. I'm sure that that was the reason for me to give up of doing the RC when my sister appeared.

Dream Stats:
Went to sleep: 00:00am
Duration: ~5min