2010 is indeed break-up year for Hollywood as more than 30 couples---married or not---broke up because of some conflicts and third party issues. This proves that sometimes being a couple in Hollywood is very difficult.
Scarlett Johansson and Ryan Reynolds
Vanessa Hudgens and Zac Efron
Michael C. Hall and Jennifer Carpenter
Arun Nayar and Elizabeth Hurley
Tim Robbins and Susan Sarandon
Actress Eva Longoria Parker and Tony Parker
Colin Farrell and Alicja Bachleda
Blake Lively (L) and Penn Badgley
Shia LaBeouf and Carey Mulligan
Tish Cyrus and Billy Ray Cyrus
Charlie Sheen and Brooke Mueller
Actress Rachel Weisz (R) and director Darren Aronofsky
David Arquette and Courteney Cox
Singer Christina Aguilera and music producer Jordan Bratman
Actress Sandra Bullock and Jesse James
Charlize Theron and Stuart Townsend
Jim Carrey and Jenny McCarthy
Sam Mendes and Kate Winslet
Ben Harper and Laura Dern
Mel Gibson and Oksana Grigorieva
Amber Rose and Kanye West
Kelsey Grammer with his then wife Camille
Bristol Palin (R), daughter of US Republican vice presidential candidate and Alaska Governor Sarah Palin, stands with Levi Johnston
Jennifer Love Hewitt and Jamie Kennedy
Rumer Willis and Micah Alberti
Screenwriter and director Cameron Crowe and Nancy Wilson
Guitarist Slash and Perla Ferrar
Singers Joe Jonas and Demi Lovato
Paris Hilton and Doug Reinhardt
Kelly Osbourne and Luke Worrall
Actors Abbie Cornish and Ryan Phillippe
Actress Patricia Arquette and Thomas Jane
"The Bachelor" Jake Pavelka and Vienna Giraldi
Actress Halle Berry and model Gabriel Aubry
Naveen Andrews and Barbara Hershey
Actors Hayden Christensen and Rachel Bilson
Update: Chelsea soccer player Ashley Cole and singer Cheryl Tweedy
Comedian George Lopez and his then wife Ann
Singer Melissa Etheridge and Tammy Lyn Michaels
Democratic presidential candidate Al Gore and his then wife Tipper
Yep, you're probably right, but not all of them ;-) They are celebrities but that don't make them completly "with no morals" (I Hope :s)