Selena Gomez & the Scene perform.

Actor Steve Harvey; actress Mindy Kaling.

Author Howie Mandel ("Here's the Deal").

Actor Clint Eastwood; Overtone performs.

Actress Minnie Driver; Rihanna performs.

Actor Zach Braff ("Scrubs"); Allison Iraheta performs; the latest castoffs from "So You Think You Can Dance").

Actor Tobey Maguire ("Brothers"); a performance from Cirque du Soleil's KOOZA.

Actor Matt Dillon ("Armored"); actress Ashley Greene ("The Twilight Saga: New Moon"); TV personality Tia Maria Torres ("Pit Bulls and Parolees").

Adam Lambert performs; model Marisa Miller.

Lady Gaga performs; beauty guru Kym Douglas.

Actress Sandra Bullock ("The Blind Side").

Actress Penélope Cruz ("Broken Embraces"); Kris Allen performs; the latest castoffs from "So You Think You Can Dance."

Singer Jon Bon Jovi; the group Bon Jovi performs; "Dancing With the Stars" contestants Kelly Osbourne and Louis van Amstel; a 7-year-old pingpong prodigy.

Actor Robert Pattinson ("The Twilight Saga: New Moon"); 13-year-old violinist Justus Rivera performs.

Actor Simon Baker ("The Mentalist"); Leona Lewis performs; former tennis player Andre Agassi discusses his autobiography, "Open."

Carrie Underwood performs; actor Kellan Lutz ("The Twilight Saga: New Moon").

Actor Dwayne Johnson ("Planet 51"); journalist Brian Williams; 12-year-old singer Rhap Salazar performs.

Actress Dakota Fanning ("The Twilight Saga: New Moon"); rapper Diddy discusses his alcoholic beverage line; "Dancing With the Stars" contestants Joanna Krupa and Derek Hough.

Media personality Ryan Seacrest; the latest castoff from "So You Think You Can Dance"; Game Week concludes.

Harry Connick Jr. performs; actress Paula Patton ("Precious: Based on the Novel "Push" by Sapphire"); Game Week continues.

Actors John and Ella Bleu Travolta ("Old Dogs"); Game Week continues.

Actress Jenny McCarthy; TV show host Cat Deeley ("So You Think You Can Dance"); Game Week continues.

Talk show host George Lopez; actress Robin Wright Penn ("The Private Lives of Pippa Lee"); 7-year-old solar system enthusiast Brandt Bickford; Game Week kicks off.

Actress Pamela Anderson discusses her new fragrance; young inventors.

Actress Amy Poehler ("Parks and Recreation"); actress Fran Drescher discusses her skin care line.