how to change between earphones and phone speakers without disconecting the earphones?

ok so i like to go to sleep listening to music on Pandora, or just my libary. the only problem is that my earphones will losen while i sleep and when my alarm goes off in the morning, i dont even hear it.

Is ther any way to change my alarm settings to sound through the phone speakers and not the earphones? maybe an app? or in the settings?