Beelzebub has to keep herself entertained in the abyss somehow. As such a change of wardrobe happens every so often, and she can tell the cowgirl look is definitely a favorite!
The first presence Beelzebub has felt in the void after eons.. needless to say the welcome is going to be very warm. If you're trapped here forever, you're trapped with her..
Beelzebub is the prince of gluttony, so eating compulsively is a common occurrence for her. Hordes of pancakes have been eaten during her time in the void.
In fact she theorizes part of her imprisonment was the fact she ate so much of Hell's food.