Rihanna may put on a tough exterior, but on the inside she still has a weak spot for ex-lover Chris Brown.

The rumor is that Rihanna will be entering “Relationship Rehab” in order to help her cope and get over Chris Brown!  As you know, they have had a rough past and it's hard or Rihanna to get completely over him.  Hopefully “Relationship Rehab” will help make her stronger on the inside.