Who needs limewire when you have google. It's really very easy to search and find music online. Go to google.com and in the search area put in this:
intitle:index.of mp3 <put song here>
So say I wanted to search for Lady Gaga "Bad Romance" then I would put in the search box this: intitle:index.of mp3 bad romance Once you do that you will have a ton of hits. Here is what I found:
From there you can then check it out. Just click on a link and see, here is the first one:
Now if you should download anything you need to make sure you know the laws for your area and if its legal to download. This is just a example to check it out. If you should download anything then make sure you scan it with your anti-virus PRIOR to opening (right click on it with your mouse and choose to scan it).
NOTE: The song Bad Romance is protected so downloading it is not legal, it was only an example and not downloaded