Microsoft is spending some serious money and effort to try and rid the bad brand image that its start up search engine Bing has received. Now it has released the new Top 100s by Year by Bing, a free iPhone application that stacks up the top songs for every year from 1947 to last year. After you select a year you will get randomly selected tracks from that year, which can range from Miley Cyrus to Kings of Leon. What is really surprising about Top 100s by Year by Bing is how much of the song is played. This is not just an iPhone application that simply gives you a few seconds of the song and a link to an iTunes' store page. Instead this really does let you get really into the song in question, which is probably why it hit the top free iPhone application slot at the iTunes' App Store so quickly. It would be really nice to be able to select the songs from a list or alter the order they are played in, but with so much here it is hard to even say that this takes away from the Top 100s by Year by Bing experience. There are constant advertisements for the Bing iPhone application here, and it is really clear the Top 100s by Year by Bing is really an advertising tool. Make sure to download Top 100s by Year by Bing as fast as possible before it returns to its original $1.99 price.