2008 was the year of the rehabilitation stunt casting. It's a scenario where everyone wins: Shows get a buzz-bump by including a famous face; stars get to show they're about more than breakdowns/rehab/famous marriages/weird marriages/etc.; and fans get some quality TV to while away the hours. Britney Spears kicked things off by appearing on the CBS sitcom How I Met Your Mother post-meltdown, Lindsay Lohan soon followed on Ugly Betty, and Katie Holmes capped things off on Eli Stone. As long as we have celebrity missteps, we'll always have guest spots to look forward to.