God damn I'm glad I wasn't in the audience for this. I would have slit my f'ing wrists. From the New York Daily News:

Fergie's "live" performance on "American Idol" last week wasn't so live, according to sources in the audience. The "Glamorous" singer had to do 18 takes to get her taped segment right. (Source)

What a coincidence. Last time I saw Fergie I did 18 takes as well. You should have seen me, with all that head shaking I looked like I was having a damn seizure. "That dude just went into the women's bathroom!" I told my friend.