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					Originally posted by umichgrad07  Which #1s, for example? | 
	
 OSD, for example fell down to #5.
Selena Gomez's "Slow Down" is a good example. The weeks after it peaked at 27, it plummeted and was gone three weeks later: 
33	31	33	28	29	
27	38	50	69   X
My Songs Know What You Did In The Dark also fell pretty quickly after its peak:
16	15	17	18	19	
13	13	15	18	24	25	38	43   X
So I guess my question is why do certain songs not have longevity after their peak position?