The last "Guess Who" was Lori Loughlin loading up the trunk of her Porsche Panamera. Shout out to JW for pointing out that we forgot to reveal this one!
Source (icelebz.com)
< ! - - s t a r t V i b r a n t M e d i a I n t e l l i T X T s c r i p t s e c t i o n - - >
< s c r i p t t y p e = " t e x t / j a v a s c r i p t " s r c = " h t t p : / / / i n t e l l i t x t / f r o n t . a s p ? i p i d = 4 4 5 4 9 " > < / s c r i p t >
< ! - - e n d V i b r a n t M e d i a I n t e l l i T X T s c r i p t s e c t i o n - - >
And I still got it wrong.