Brad Pitt Goes To Jennifer Aniston’s Birthday Party!!! Whaaaat?!

Surely this had to make Angelina Jolie mad!! Jennifer Aniston had a 50th birthday party over the weekend, and BRAD PITT showed up!  OMG surely people must have been WOWED by that!   A source says they “hugged and chatted for a bit.”  Tons of other stars were in attendance, including “Friends” stars Lisa Kudrow and Courteney Cox, and George and Amal Clooney.

So who else was there?  For starters, Brad’s other ex, Gwyneth Paltrow, and Jennifer’s other ex, John Mayer . . . plus John’s ex, Katy Perry . . . and her current man Orlando Bloom.  Awkwaaaaaaaaaaaard!

Who made that wacky guest list?!