Jennifer Nettles of duo Sugarland debuted her solo single 'That Girl' on 'Good Morning America' on Tuesday (Aug. 20), and it was a real treat.  

The groovy track, which she co-wrote with the acclaimed Butch Walker, is the lead single for the singer's forthcoming solo debut album, and it was really fun to hear her perform the beat-driven song. Judging from the smile on Nettles' face, she had a whole lot of fun showcasing it, too.

The songstress looked chic in an all black ensemble, sporting a deep v-neck shirt with voluminous sleeves and sleek pants. Her wavy blonde hair was picture perfect, and anyone who didn't know that Nettles is a new mom wouldn't guess it by looking at her slim figure.

Although it was a bit strange to see Nettles onstage without her cohort Kristian Bush, she seemed completely comfortable taking the lead -- and everything about her performance, from the hand claps to the vocals, was captivating. Nettles hasn't lost any of her stage presence -- she shined out on her own.

The Sugarland frontwoman's performance makes her upcoming album even more exciting, as country music fans will be vying for more songs and appearances from the talented star.