I hear this song in Kohls, supermarkets, and I think a JC penny. It's sung by a female vocalist, fast but not heavy. There are strings in the background and idiosyncratic production. The lyrics are about a summer friend, who she loves, and I think she mentions the summer wind. They go something like this:
Hello again, my summer friend
O how I love, the summer wind?
I've seen people asking about this song on Yahoo Answers, but no one's provided an answer, so if anyone can tell me what song this is there will be more grateful people than me!