In this warmup, if my hand is open, we sing London Bridge out loud. If my hand closes, carry on singing, but not out loud, inside your head. It works like this. ♪ London Bridge is falling down ♪ ♪ London Bridge is falling down ♪ ♪ Lady ♪ Your turn. If my hand is open, sing out loud. If it's closed, sing in your head. ♪ Ready, steady, off you go ♪ ♪ London Bridge is falling down ♪ ♪ Falling down ♪ ♪ Falling down ♪ ♪ My fair lady ♪ Let's try one more. Starting close this time. Start in your head. You ready? ♪ Ready, steady, in your head ♪ ♪ Falling down ♪ ♪ Falling down ♪ ♪ My fair lady ♪.