Miranda Lambert Is Red Hot, Looks Skinny at 2014 Kentucky Derby: Picture

Miranda Lambert
Miranda Lambert attends 140th Kentucky Derby at Churchill Downs on May 3, 2014 in Louisville, Kentucky. Mike Coppola/Getty Images

Lady in red! Miranda Lambert sizzled while attending the 2014 Kentucky Derby in Louisville, Kentucky on Saturday, May 3.

The country singer, 30, walked the red carpet in a matching knee-length Randi Rahm dress and accessorized with a simple ribbon hat. She added a touch of red lip and topped off the look with cranberry heels and a small clutch.

Lambert first debuted a much skinner frame while attending the 2014 Grammys with husband Blake Shelton in L.A. last January. The star donned a cleavage-baring silk Pamella Roland gown at the big award show.

"Miranda was turning and posing, eager to show off her angles," an onlooker said in Us Weekly's Feb 10 issue. An insider added: "Everybody was telling Miranda how great she looked."

Indeed, Lambert dropped an incredible 25 pounds in three months at the time. Since then, L.A.-based nutritionist Samantha F. Grant estimated she lost an additional ten.

"Miranda says, 'This is not a diet, this is my new life,'" the insider explained to Us. "She has changed her lifestyle."

Tell Us: What do you think of Miranda Lambert's Kentucky Derby look? Tweet with @UsWeekly using #stylebyUs!

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