Rimes is in Chilliwack, Canada, working on a new project.
But something seemed to spook her when she looked down at her phone between takes.
After getting her mystery message, Rimes, 35, left the set and didn’t return for over half an hour.
Maybe the message involved hubby Eddie Cibrian, 44, who has been rumored to be spending a lot of personal time with Rachel Bilson, his 36-year-old co-star on a new movie.
Or perhaps it contained news about ex-husband Dean Sheremet, who just got engaged to his new girlfriend, Vanessa Black.
Rimes has tried to put on a healthy face recently when it comes to her relationships and made sure to pack on the PDA during a visit to Cibrian’s movie set in mid-March.
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