'DWTS': How Alyson Hannigan's Been 'Transformed' Into What Sasha Calls 'Body by Sasha' (Exclusive)

Alyson Hannigan and Sasha Farber chat with ET's Denny Directo after 'Dancing With the Stars' semi-finals, which aired Tuesday on ABC and Disney+. The dancing partners react to the shocking semi-finals results and how all five couples made it through to the finale. The two also open up about Alyson's evolution throughout the competition and how tough their jive routine was this week. Plus, Alyson and Sasha talk about how she's made a physical transformation since week one, saying it's all thanks to what Sasha calls 'body by Sasha.'