Broken RSS Feed

Can someone help us fix our RSS feed? We are just a basic WordPress account and this is affecting our music blog’s ability to be collated by HypeMachine.

I have no idea how to remove/add plugins, or any stuff like that! I’m pretty helpless when it comes to web development. Here’s the error message on my feed:

This page contains the following errors:

error on line 168 at column 31: Input is not proper UTF-8, indicate encoding !
Bytes: 0x1A 0x3C 0x73 0x74

http://musicbetweenfriends.com/feed

Any assistance or direction would be great!!

– Katie