Rumer Willis Gets Adorable, Super Enthusiastic Birthday Greeting From Baby Sister Mab
 

Rumer Willis Gets Adorable, Super Enthusiastic Birthday Greeting From Baby Sister Mabel
Rumer Willis' little half-sister Mabel gave her older half-sibling a super cute (and loud!) 27th birthday greeting to remember -- watch the cute videoThis article originally appeared on Usmagazine.com: Rumer Willis Gets Adorable, Super Enthusiastic Birthday Greeting From Baby Sister Mabel