Apostrophes for contraction and possession.
1. It's not fair that Jamess' lollipop isnt as big as his best friend's.2. Its not fair that James' lollipop isnt' as big as his best friend's.3. It's not fair that James' lollipop isn't as big as his best friend's.4. It's not fair that James'es lollipop isnt as big as his best friends.
Click on the sentence where all the uses of apostrophes are correct.