Apple has released iTunes 12.1 for Mac OS X Yosemite. It introduces a new iTunes widget for the Notification Center that lets you see what song is playing, skip ahead, and favorite.
Also, when listening to iTunes Radio, you can purchase the song that’s being played within the widget. Additionally, iTunes 12.1 promises performance improvements when syncing an iPhone, iPad, or iPod touch.
iTunes 12.1 can be downloaded via the Software Update Mechanism in the Mac App Store.