Great idea! Carrie Underwood has been working hard on her post-baby body after giving birth to baby No. 2 just three months ago, and now she is now revealing what exactly her gym secret is.

“Putting together a fashionable but also functional outfit gives me a little boost when going to the gym — especially when I need an extra push or I’m not feeling my best,” the 36-year-old country singer told People. “I try to put a cute look together with my favorite pieces — a legging with a pattern on the bottom and cute and comfortable tank and a zip-up hoodie to complete the outfit.”

The American Idol alum knows all about fashion — especially since she is helping design the spring collection of workout gear for her athleisure line, CALIA by Carrie Underwood. “Now that the weather is starting to get nicer, I’ve really enjoyed diving into our CALIA spring collection and putting together new, fun looks,” she said. “We have a ton of spring pieces in this new dusty pink called Mesa Rose, and every time I wear it I think ahead to the warm weather that’s right around the corner.”

The performer, who shares newborn Jacob and 4-year-old Isaiah with husband Mike Fisher, recently revealed how tough it has been getting back in shape after giving birth. “I’m going to be honest, ‘bouncing back’ after having Jacob has been much more difficult than after I had Isaiah and I’ve been pretty hard on myself lately,” the hitmaker captioned a mirror pic she shared on Instagram on March 19.

“I go into the gym and I can’t run as fast or as far. I can’t lift as much weight or do as many reps as I could a year ago,” she continued. “I just want to feel like myself again … for my body to feel the way that I know it can. I’m going to keep staying the path because it is a journey and as long as I’m always working towards my goals, one day I’ll reach them. I’m going to take it day by day, smile at the girl in the mirror, and work out because I love this body and all it has done and will continue to do.”

We know Carrie will reach her goals, whatever they may be!