Type the name of the song or artist into the search box at the top of the page. Use both for the most accurate results.
Scroll down the page until you find the correct song. Click on the title to view that post.
Press the "Play this track" button to listen to the song. This will verify that it is the song you are looking for.
Click on one of the "Download Song" links below the title of the song. Select the program you would like to use to download. Common options are iTunes, Amazon and eMusic. You will be directed to that website.
Download your song, following the directions of your selected website.