rules focused on those who made it through the first stage being placed into one of two groups: "music" and "variety", having to successfully impress the judges across two rounds of performances, with each three minutes in length and conducted without interruptions from the judges. The other change was to incorporate the live round rules for judges used on other editions of Got Talent, particularly Britain's Got Talent. The new arrangement primarily saw judges giving feedback on a performance when it had ended but still using their buzzers to stop performances, while the public voted on who moved to the next stage in the semi-finals. Other than these changes, the second season did not incorporate the use of Wildcard acts, while the results for each live round (except the final), were each given before the start of the next round. Auditions took place during Spring 2007, with auditions being conducted within the cities of New York, Los Angeles, Chicago, and Dallas. Following the previous season, prior to filming taking place, replacements to the cast were made. Regis Philbin, who did not to return for undisclosed reasons, was replaced by Jerry Springer as host. Brandy Norwood was replaced by Sharon Osbourne as judge, after she dropped out due to a difficult legal matter she was dealing with. Twenty of the participants who auditioned for this season secured a place in the two live semi-finals, with ten acts in each moving on to compete against each other in two "knock-out" finals. This resulted in four left to compete in a grand-final round. These are the results of each participant's overall performance during the season: | | | Semi-finals summary Buzzed out | Semi-final 1 (July 17) Semi-final 2 (July 24) Finals summary | | | | Buzzed (Top 10 & 8 Finals only) Finals - Top 10 (July 31) Finals - Top 8 (August 7) Grand-final (August 14) References 2007 American television seasons America's Got Talent seasons