If you want to open your hips and increase flexibility of your inner thigh, the butterfly sit is a great start.
Press the soles of your feet together and hold on to your feet, gently pushing your knees towards the ground. To increase the stretch, drop your head forward to the floor – this will also stretch your glutes.
But for a REALLY awesome hip stretch, turn over to prone lie, bend your knees and bring your toes together. Keep your hips and knees on the ground! Your feet will probably be OFF the floor but the more you practice, the easier it will be to get your feet down towards the ground.
Take it slowly… this is a difficult stretch. And remember, Brooke trained for years to be this flexible!