Most people have some form of déjà vu at some point in their life...for some it's rare and for others it can be very often. Sometimes I will have a month with multiple déjà vu's or I can go a span of a few months without a déjà vu. If you are unsure of what déjà vu is you can read a short description about it on wikipedia: http://en.wikipedia.org/wiki/D%C3%A9j%C3%A0_vu
I had a song déjà vu yesterday. Maybe not quite a déjà vu, but a bit stranger... I had a dream at least a year ago that played a song in the background of the dream. The song was playing in my dream right before I woke up--I even tried to sing/hum it to Chris because I liked it so much. I remembered the tune and remembered the line "turn the car around," and I said to him, "I can't wait till it comes out for real" (because I had never heard the song before). Sure enough, I found the song a couple days ago--first heard it online (listening to the radio online) and then I downloaded it from itunes...And it hit me--that was the song! I recognized it from the tune and from it's "turn the car around" line. The song is called "Shattered" by O.A.R.. ...interesting that I had a pre-cog dream about it before the song ever came out. Chris even vaguely remembers me singing the "turn the car around" line to him after I woke up from my dream. What is also interesting is that I couldn't have heard this song before because the cd with the song just came out for the first time within the last month--maybe out and about in the last two months at most.
I have another song I'm waiting on to come out too, it was a dream where I was shopping at Gap and the song was playing in the background. A really annoying song though, so I can't remember too much about it other than being annoyed by it.