When they decided to wear matching denim suits.
When Nicole supported Paris' tiara phase.
Their friendship with Kim Stewart.
When they, along with Nicky Hilton, were soooo metal.
When Paris thought it was a good idea to bring her poor dog everywhere.
When they walked the pink carpet alongside a Texas Longhorn for the premiere of The Simple Life 2.
When Nicole made this "sexy" pose for the camera.
When they hosted the 2004 Teen Choice Awards.
When Paris and Mariah Carey had a "good side" standoff while posing for a photo.
When Paris and Johnny Knoxville had an intellectual conversation about a U.S. foreign policy. Wait, scratch that, it was probably about where the after party was at.
When they supported JC Chasez's solo career.
When they thought it was a good idea to party with Andy Dick.
When Paris wore these flared Juicy cargo sweat pants -- with Uggs, of course.
When Nicole didn't stop the unholy frosted-tipped relationship between Nick Carter and Paris.
When Paris pondered if it really was "chicken or fish," when posing with Jessica Simpson and OutKast.
When Paris tried to work those 7 For All Mankind jeans.
When they posed with Jason Bateman.
And finally, when they hung out with The Anna Nicole Show's Bobby Trendy.