If anybody knows about true love, it's obviously Jason Alexander, who spent a whopping 55 hours married to world-famous pop star Britney Spears. Right? Alexander fancies himself an expert on the buxom blonde's relationships. It goes without saying that the never-was is using Spears' recent engagement to extend his 15 minutes of fame. He calls the relationship "a complete sham" and maintains that fiance Jason Trawick will end up breaking Brit's heart. Alexander reveals, "If they actually get married, it will probably only last for a year two, but not much longer than that." Ahem... That's a lifetime compared to his 2-day union. Alexander knows all about failed marriages as the other half of Spears' shortest-lived one. Ironically, the second Mr. Spears, Kevin Federline, had nothing but positive things to say about Spears' fiance. However, the first Mr. Spears took aim at the third Mr. Spears. In an exclusive interview with Star magazine, Alexander is acting like her pending nuptials to Jason Trawick are the end of the world. He maintains that the "Toxic" singer's smiles are all for show, and she's never been unhappier. He adds, "I think Britney is really unhappy but doesn't know how to get out. I don't think she loves [Trawick]." Alexander says he has heard from mutual friends that the singer is stuck like chuck and still under the thumb of her handlers. The good news for Brit is that her ex is still here for her: "She feels like she has no choice but to listen to what her dad and [Trawick] say. But I want her to know that she can get out of this thing if she really wants to."