It's kind of hard to believe that America's Got Talent has been running for 20 summers now, but it's true. We've watched talented singers, dance troupes, magicians, ventriloquists and *checks notes* ...

How does a network fill two hours for a finale results show? Easy. Bring on multiple musical acts, like Flo Rida, Ne-Yo, Green Day and Justin Bieber with Big Sean, team the finalists with celebrities ...