Because Katherine Heigl is shooting a romantic kissing scene with Demi Moore's much younger hubbie, ASshton Kutcher.

But, seriously, it's not as scandalous as I'd like to makeout, pardon the pun. Both actors brought their significant others with them. So boring. 

The movie they're filming is called "Five Killers" and they're on set in the French Riviera. Well, that's one movie I definitely will not be paying to go see!

Bauer-Griffin