Popsugar Fitness Celebrity Fitness Celebrities Working Out Feb. 21, 2014 Burn 60 and Tracy Anderson! The Classes Celebs Are Loving February 21, 2014 by Lizzie Fuhr View On One Page Photo 5 of 5 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 5 Hilary Duff Hilary Duff has stayed on a steady workout schedule! She headed into the gym rocking a bright tie-dye sweatshirt with a number of big bags in tow. Previous Next Start Slideshow Celebrity Fitness