Take that, Sarah Stage! Nascar driver Kyle Busch's wife Samantha just wowed social media with her insane post-baby bod pics! Model Sarah Stage recently made headlines touting her extremely fit pregnancy body. She used a combination of pilates and "light prenatal training" to stay in shape. Her abs are so hard in this picture below, hardly anyone could tell she was in her third trimester! [caption id="attachment_76891" align="aligncenter" width="382"] Sarah Stage, 8 months pregnant[/caption] But Samantha Busch has proven she can upStage her, so to speak. In an Instagram post revealing one week old son Brexton to the world, the new mom shocked her following with her impeccably toned post-natal figure. [caption id="attachment_76895" align="aligncenter" width="400"] Samantha, days before giving birth[/caption] Samantha attributes her smoking physique to the Andrea Orbeck Pregnancy Sculpt and Suzanne Bowen’s Slim & Toned Prenatal Barre workouts. "As I approach 37 weeks, I am still trying to work out regularly, although I can't lie, it's getting more and more difficult because little man is dropping! Fitness and eating healthy (for the most part) have been important to me throughout my entire pregnancy," she explains. Samantha's husband Kyle couldn't be more proud of his wife, who he calls a champ. And of course he is completely in love with their new bundle of joy. [caption id="attachment_76896" align="aligncenter" width="550"] The happy couple at Kyle's race[/caption] What you think of this fit momma? Share your thoughts!