I've always believed all possessive pronouns do not take apostrophes. Is 'mine' an exception, since google shows numerous examples of mine's?<br/><br/> Could someone please explain whether or not mine's is OK and explain its use(s)? Thanks.<br/><br/><i>a. The hat belongs to a friend of mine's.</i><br/><br/><i></i><br/><br/><i>b. The hat belongs to a friend of mine.</i>