ANSWER:

There is a hadeeth where abu hurairah May Allah be pleased with him ordered a woman not to go to the masjid wearing her perfume until she takes ghusul as Allah will not accept her prayers.

Some scholars say that this is mandatory and others say that this is recommended. 

If a woman applies perfume and goes out and non mahram men smell it, so she like a fornicator, does she has to perform Ghusl to ‘wash off’ her sin as if she is impure after adultery?