americas got talent

First when

Nick Cannon introduced the judges, the Miami All Stars took the stage. A taped segment revealed they had to change their routine at the last minute when they couldn't get clearance to use the music they had originally picked.

The first twelve contestants competed in the opening round of the quarter-finals, vying for four spots in the semi-finals.

Avril Lavigne books 'America's Got Talent' -- EXCLUSIVE

Lavigne will perform “What the Hell” and “Smile” during the live results show that begins at 9 ET on NBC. It will also feature a performance from the Broadway musical “Priscilla Queen of the Desert.”

When you took the stage all the strategies, methods or whatever you may call it , none of that mattered. All you need to do is impressed the audience and put them the smile of excitement that they want you to perform again next time.