Say it ain't so!

After reports that Miley Cyrus and Liam Hemsworth had postponed their wedding, her engagement ring is off yet again, and this time it doesn't appear to be at the jeweler getting re-sized!

"Miley and Liam had another argument before the weekend and the engagement ring is off again," a source close to the 20-year-old singer tells People. "They don't want to get married until the figure out their problems. But Miley is very worried about losing Liam. She is crazy about him."

Apparently the two hit a rough patch after she returned from Miami last week, and after Liam's trip to Australia and the Philippines last month following his alleged hookup with January Jones, things just haven't been the same for the duo. The source added that the couple are postponing the wedding because it's the "mature thing to do," yet they are still living together at her Toluca Lake house.

Sounds like there's some hope of them patching things back up!