Ladies is the plural form of lady, so the apostrophe goes to the right - ladies'. If you are wondering why we don't write ladies's, it is because ladies is one of the exceptions, along with girls', parents', … In britain it has largely become a matter of taste and personal preference as to which of chairman, chairperson, or chair are used.

Having heard the phrase, faint heart never won fair lady for the third time in very short span, i'm determined to find out its origin. Unfortunately, when i google, i'm getting a bunch of low-q