"Teen Mom OG" star Mackenzie McKee is living proof that you can enjoy yourself on Thanksgiving and still be able to fit into your jeans the following day! The MTV reality star hit up social media following her Turkey Day splurge and flaunted her amazing physique while hitting the gym hours after the national day of thanks came to a close. Always the thriving entrepreneur, McKee made sure to use her own success story to tout some killer Black Friday deals for her signature fitness program.