The "Motivation" singer puts meaning to that exact word with these tummy-toning moves from her trainer
Sit upright with your legs straight and arms in a T-formation. Draw your breath in, lengthening your spine, then exhale and rotate to your right side, finishing the rotation with two small pulses. Inhale and move back to center, then repeat on left side. Do 10 reps on each side.
Credit: Marc Royce