Perpetual liar and fame whore Crystal Harris continues to lie. The middle-aged looking prostitute claimed that she and Hugh Hefner only had sex ONCE. Then she claimed that she's not dating Dr. Phil's son, who she now lives with, and now she's saying that she needs to get rid of her engagement ring because of "bad memories."

Harris has put her 3.39 carat diamond up for auction where it will be available for bidding at Christie's in NYC in October.

The former Playboy model, 25, "couldn't bear to look at the ring anymore because it brought back bad memories," a source tells TMZ.

According to the listing, the ring is expected to fetch between $20,000 and $30,000.

Photo: Wenn