I'm planning a "music on the cheap" post in the near future, but it's probably no surprise that using iTunes free downloads are a frugal way to get new music. If you like Diana Krall, iTunes has a free download this week of her Jingle Bells (see the link to the right). I think this lasts until Tuesday so go get it!
(And in the interest of full disclosure if you go their via a link of mine and spend money, I get a small commission. iTunes made me fall in love with music all over again so I wholeheartedly stand by my shill-osity.)