Real-life couples sometimes fizzle onscreen, but Vaughn and Aniston generate plenty of sparks. Here's how they compare to other matchups, from lukewarm (left) to smoking (right).
Ben Affleck & Jennifer Lopez GIGLI
Matthew McConaughey & Penélope Cruz SAHARA
Tom Cruise & Nicole Kidman EYES WIDE SHUT
Vince Vaughn & Jennifer Aniston THE BREAK-UP
Brad Pitt & Angelina Jolie MR. & MRS. SMITH
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