New Year, New You in 2014

Celebrity Weight-Loss Winners

From Tyra's get-fit plan to Heidi's post-baby workout, these stars battled the bulge – and won!

ELLEN POMPEO

Working with trainer Gregg Miele throughout her pregnancy helped the Grey's Anatomy star, 40, quickly bounce back to her pre-baby bod after giving birth to daughter Stella on Sept. 15. "I feel great!" Pompeo told PEOPLE.