I purchased two Pepsi bottles today unaware that the contest began - I was tired and I opened up a bottle of pepsi to find that I won a FREE SONG!!! But here is where things got weird. I entered the song into iTunes and purchased a song and then I got an alert " You're Free Song Is Out Of Date, blah blah blah click ok and repurchase" so I did... but will I get charged for the "repurchase" or is it free?