, 22, & Jake Gyllenhaal
Broken up after two years, they still share custody of German shepherd Atticus.
Heath Ledger, 25, & Naomi Watts
A 10-year age difference reportedly did in the two-year relationship.
Nicky Hilton, 21, & Todd Meister, 34
Two months after their Vegas wedding-on-a-whim, the pair began work on an annulment.
, 42, & Penélope Cruz, 30
Hectic schedules were blamed for the end of their three-year romance.
Katie Couric, 47, & Tom Werner, 54
The bicoastal commute (she's in N.Y.C., he's in L.A.) took its toll after four years. Couric has since dated jazz trumpeter Chris Botti, 42.
Barbie, 45, & Ken, 43
After four decades, Barbie asked Ken to vacate the Dream House.
John Stamos, 41, Rebecca Romijn
Married 5½ years, the two parted ways amicably.
THEY SAID IT WOULDN'T LAST THE YEAR...BUT IT DID
, 32, & Justin Timberlake
, 42, & Lance Armstrong, 33
, 42, & Ashton Kutcher