LeAnn Rimes Flashes Her Abs During 5 A.M. Workout

12/30/2013 04:07 pm ET

On a Monday morning, most people are still asleep at 5 a.m., but LeAnn Rimes was up and already at the gym.

Rimes posted a photo from her early morning workout on Dec. 30. In the photo, she wears just a tiny sports bra and some spandex pants, flashing her toned abs and a thumbs-up. The fresh-faced blonde was smiling happily as she snapped the selfie, even though she was awake before sunrise.

"5am workout before a glutinous week. Who got up w/ me?! #healthybodyhealthymind #monday," the 31-year-old tweeted.

Later in the day, Rimes was spotted with husband Eddie Cibrian and his two sons at Los Angeles International Airport. The four jetted off for a New Year's holiday.

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