David Letterman

Leyla Ghobadi better have her ducks in a row.The Canadian model did an interview with Star magazine claiming to have slept with Kanye West twice since he has been with Kim Kardashian, once while Kardashian was pregnant. True or not, it means the clock is ticking on Ghobadi's 15 minutes of fame. So if she wants to cash in, she had better do it soon because when the hype dies down and the media moves on, most infamous other women find themselves high and dry.PHOTOS: Leyla Ghobadi's sexy pictures "Typically, the 'careers' for Hollywood mistresses are short-lived. More often than not the mistresses disappear once the press does. America really rallies behind the scorned woman more these days – as was seen in cases like Sandra Bullock and Eva Longoria," talent agent Alec Shankman told FOX411's Pop Tarts column. "Between Jesse James and Tiger Woods alone, we had upwards of dozens of mistresses involved, yet no one is really talking about any of them anymore."Just ask Michelle "Bombshell" McG...

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