Tim wanted to surprise his amazing partner Bennie during his birthday with a flash mob proposal to one of his favorite songs.

Did someone call for the queen!?
On a stroll through San Francisco, they stumbled upon a "Single Ladies" flash mob.
Psh, obviously it was all planned just for Bennie!

Then Bennie got dragged INTO the mob...

And the rest is Beyoncé history:

H/T:Queerty