Single Ladies of 2011
20. Dianna Agron
One week you're supposedly getting married, the next you're breaking up. That's the Hollywood way -- just ask Dianna Agron! She and I Am Number Four co-star Alex Pettyfer broke up midway through promoting the new flick in mid-February, just days after engagement buzz surfaced. Whoops! The two dated for less than a year and apparently Dianna was the one who moved out of the home they shared.