Gaga fans shouldn't worry about LFN.  
They should worry about how TEOG performs irrespective of the other songs around it. 
TEOG will not be able to compete w/ LFN.  Gaga can't compete w/ Dr Luke.  If you recall, even her most iconic, career-defining, praised, award-winning song (BR) couldn't compete w/ Dr Luke. 
But if you look at how BR performed, irrespective of the other songs (that blocked it 

) on the charts, it did amazing.