Overview: Cheese steaks and the Liberty Bell aren't the only famous things to come out of Philadelphia – add Justin Guarini to the list! Last year's ""American Idol"" runner-up jets back to his hometown for the opening of ""From Justin to Kelly"" (opposite Kelly Clarkson) and ET's on site with the story! After that: Jim Carrey is a tough act to follow. Can anyone really top his performance in ""Dumb & Dumber""? An unknown actor goes for glory in ""Dumb and Dumberer: When Harry Met Lloyd.""