Loud Alarm for Mac

From Loud, Inc.:

Wake up in style with Loud Alarm, which lets you get your day going by waking up to your favorite mp3! Loud Alarm is elegant, simple and incredibly easy to use, so you don't have to do any thinking when you're ready to go to bed and need to wake up soon enough. Set the time and select an mp3 to play and never worry about the time again. Perfect for students who would rather not think about setting an alarm when going to sleep at an unnecessarily terrible hour.