Everyone knows about the three main meals of the day. You've got breakfast, lunch and dinner--but Taco Bell introduced us to the fourth. We think it might even compete with Breakfast for the most important meal, because nothing feels better than a late night feast after hours of partying with your friends. Sometimes it’s hard to get into the mood to go out and stay up late enough to have a fourth meal, so Pepsi.com gathered five songs that are here to help motivate you to get up, out and stay all night.