03/16/2011 10:24 am ET Updated May 25, 2011

LeAnn Rimes' Dramatic Weight Loss (PHOTOS)

A nutrition expert has told RadarOnline.com that LeAnn Rimes could be suffering from 'pre-wedding stress' after reviewing new images that have appeared of the country superstar.

The latest photographs show Rimes, 28, looking super skinny as she stepped-out with her fiancé Eddie Cibrian, 37, in Calabasas, California, at the weekend.

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