( EW.com ) -- How did the producers manage to keep the First Lady 's involvement in the ceremony a secret ? Why did n't Meryl Streep open the envelope for best actor ? Did Host Seth MacFarlane and Kristin Chenoweth actually know the identity of the losers before they wrote that snarky ode to them ? We asked Director Don Mischer to answer some of our burning questions about Sunday 's telecast of the Academy Awards . When did they book Michelle Obama to reveal the Best Picture winner ? `` That happened about two weeks ago and we kept it all a secret , '' Mischer told EW . `` There were just a few of us who knew . We had a code name for it ... Operation Florence . Nobody on our crew knew until Sunday afternoon before we went on the air . '' When did Seth MacFarlane and Kristin Chenoweth write the loser song that ran over the end credits ? `` It was rewritten during the show , '' Mischer said . `` Seth wrote a template , a framework . There was a big joke in there about Argo not winning , but since Argo won , we had to rewrite it . It was being rewritten until the last award . We have four minutes of credits at the end and it 's always kind of a throwaway , so we decided to try something more fun . '' 'Walking Dead , ' 'Girls ' : Sunday TV recaps . Did you know Meryl Streep was n't going to open the envelope for the Best Actor category on camera ? `` No , she threw me for a loop ! I want to see the envelope opening up as I 'm coming out of the film clip . She must have opened it up during the film clip . That kind of threw me . There was a technical hitch right there . I like to cut to these boxes where you see everybody and the winner pops up full . She said the winner before we could ever blow up the box with the winner ! '' Oscars : Sound Editing tie is a rarity . What happened to Jennifer Lawrence on her way up stage to accept her Oscar for Best Actress ? `` She fell , but broke her fall with her left arm , '' said Mischer . `` I do n't know whether she tripped on the fabric of her gown going up the steps . It was awkward . As directors , we worry about that stuff . What happens if someone collapses on the way up the steps or something ? I was really happy when we realized she was not hurt and could survive the whole thing , get up there and react . It was quick and painless . Those are the things that happen with live television ! '' See the full article at EW.com . CLICK HERE to Try 2 RISK FREE issues of Entertainment Weekly . © 2011 Entertainment Weekly and Time Inc. All rights reserved .
MacFarlane and Chenoweth wrote the loser song during the show . Director did n't know Meryl Streep was n't going to open envelope on camera . Michelle Obama 's appearance was referred to as `` Operation Florence '' before the show .