Last year, there were reports that iPods and pacemakers were a bad combination, and that the music player might cause the pacemaker to malfunction. The concern was that the strong magnet inside the iPod could interfere with the electromagnetic technology of the pacemaker.

New research from a scientist at the FDA, however, disputes that theory. Howard Bassen tested four different iPods against a pacemaker set in salt water and found that the iPods could not disrupt the pacemaker's operation.

So if you have a pacemaker, it may be safe for you to rock on and rock out with your personal music device. But as always, don't take it from the Internet...talk to your doctor first.