VINCE VAUGHN threw a 37th birthday party for girlfriend JENNIFER ANISTON at her Malibu, California, mansion – catered by fast food chain McDonalds.

The low-key celebration was attended by a few of Jen’s closest friends.

The birthday celebration was a far cry from the lavish, star-studded Beverly Hills bash former husband BRAD PITT threw for her last year (05).

Guests at that celebration, including MEL GIBSON and GWEN STEFANI, dined on a gourmet buffet.