Go to Playlist.com and create an account.
Go to the top menu bar and click on "Create a Playlist." Name your play list and give it a description. Allow your friends to collaborate on your play list by checking the box next to "Make this a group play list so my friends can add songs."
Search for the music you want in your play list by using the search bar on the top of the page. You should see your play list you've just created on the right side of the search results page.
Click on the small "plus" sign next to the songs that you want to add to your play list. Add up to 200 songs to one play list. You can even add songs from other user's play lists and other groups. Click on "Add" next to the songs you want to include. Embed your play list in a music player on your website or blog.