Crystal Harris has called off her wedding to Hugh Hefner just five days before she and Hef were scheduled to walk down the aisle. Hugh tweeted that Crystal "had a change of heart," while TMZ claims that Crystal and Hef weren't seeing eye to eye on a few things. And by 'a few things,' I mean that Crystal felt Hef was making it hard for her to be a successful golddigger.

Crystal tell us she was fed up with the "couple hundred dollar" weekly allowance she got from Playboy -- and wanted to make her own cheese. Crystal purely focused on launching her music career -- even with the wedding just days away.

Hugh's heartbreaking bimbo felt that she "couldn't be married to Hef and have a successful music career."

... Anyone know if this whore can sing?! Let's not even play games here. Many people don't tell the truth when they end a relationship. This has sh!t to do with an allowance or some possible music career. Crystal was tired of the facade. Poor Hef! He couldn't have seen this one coming.

Photo: Wenn