Celebrity Circuit

Pop star Katy Perry, left, links arms with an unidentified airport worker, as she arrives at Heathrow Airport in London on March 16, 2012.

NEXT: Tyler Perry

President Obama is introduced by actor and director Tyler Perry, right, before delivering remarks at a campaign event at Tyler Perry Studios in Atlanta, March, 16, 2012.

NEXT: Julia Roberts

Actress Julia Roberts arrives at the premiere of the feature film "Mirror Mirror" in Los Angeles on Saturday, March 17, 2012.

NEXT: Octavia Spencer

Oscar-winning actress Octavia Spencer arrives at the Alabama Statehouse in Montgomery, Ala., March 21, 2012. Spencer was greeted by more than 400 people as she arrived at the Statehouse to a hero's welcome.

NEXT: Octavia Spencer

AP Photo/Montgomery Advertiser, Mickey Welsh

Octavia Spencer, winner of the Academy Award for best supporting actress for the film "The Help," smiles as she is honored by her hometown of Montgomery, Ala., March 21, 2012.

NEXT: Jon Hamm and January Jones

Jon Hamm, center, is flanked by actress January Jones and Matthew Weiner, creator of AMC's "Mad Men" television show, as he takes a photo with his mobile phone during opening bell ceremonies at the New York Stock Exchange, March 21, 2012.

NEXT: Christina Hendricks and January Jones

Actresses January Jones, left, and Christina Hendricks attend the TimesTalks event featuring the cast and creator of "Mad Men," sponsored by The New York Times, in New York, March 20, 2012.

NEXT: Jennifer Lawrence

Actress Jennifer Lawrence arrives for an appearance on the "Late Show with David Letterman" in New York, March 20, 2012.

NEXT: Liam Hemsworth

Actor Liam Hemsworth attends a special screening of "The Hunger Games" hosted by The Cinema Society and Calvin Klein Collection at SVA Theatre on March 20, 2012, in New York.

NEXT: Johs Hutcherson

Actor Josh Hutcherson attends a special screening of "The Hunger Games" hosted by The Cinema Society and Calvin Klein Collection at SVA Theatre on March 20, 2012, in New York.

NEXT: Marc Anthony

Singer Marc Anthony arrives at the ASCAP Latin Music Awards in Beverly Hills, Calif. on March 20, 2012.

NEXT: Meryl Streep and Katie Couric

From left, Katie Couric, actress Meryl Streep, filmmaker Lee Hirsch and producer Cynthia Lowen pose at a special screening of "Bully" in New York on March 20, 2012. The film, directed by Sundance and Emmy-Award winning filmmaker Lee Hirsch, will be released in theaters on March 30.

NEXT: Esperanza Spalding

Singer Esperanza Spalding performs at the annual Starbucks shareholders meeting March 21, 2012, in Seattle.

NEXT: Fergie

Singer Stacy "Fergie" Ferguson of the Black Eyed PEas and Voli Light Vodkas CEO Adam Kamenstein announce her partnership in Voli Light Vodkas at the James Hotel on March 22, 2012, in New York.

NEXT: Fergie

Fergie announces her partnership in Voli Light Vodkas at the James Hotel on March 22, 2012, in New York.

NEXT: Catherine Deneuve

French actress Catherine Deneuve arrives at the U.K. premiere of "Beloved" at a central London cinema, March 21, 2012.

NEXT: Jane Seymour

Jason Merritt/Getty Images for Alzheimer's Association

Actress Jane Seymour attends A Night at Sardi's to mark the 20th anniversary of the Alzheimer's Association at The Beverly Hilton hotel on March 21, 2012, in Beverly Hills, Calif.

NEXT: Kaley Cuoco

Actress Kaley Cuoco attends A Night at Sardi's to mark the 20th anniversary of the Alzheimer's Association at The Beverly Hilton hotel on March 21, 2012, in Beverly Hills, Calif.

NEXT: Mayim Bialik

Actress Mayim Bialik attends A Night at Sardi's to mark the 20th anniversary of the Alzheimer's Association at The Beverly Hilton hotel on March 21, 2012, in Beverly Hills, Calif.

NEXT: Shelley Fabares

Actress Shelley Fabares attends A Night at Sardi's to mark the 20th anniversary of the Alzheimer's Association at The Beverly Hilton hotel on March 21, 2012, in Beverly Hills, Calif.

NEXT: Zachary Levi

Actor Zachary Levi poses at the 20th anniversary of the Alzheimer's Association A Night at Sardi's, March 21, 2012, in Beverly Hills, Calif.

NEXT: Marilu Henner

Actress Marilu Henner attends A Night at Sardi's to mark the 20th anniversary of the Alzheimer's Association at The Beverly Hilton Hotel on March 21, 2012, in Beverly Hills, Calif.

NEXT: David Hyde Pierce

Actor David Hyde Pierce attends A Night at Sardi's to mark the 20th anniversary of the Alzheimer's Association at The Beverly Hilton hotel on March 21, 2012, in Beverly Hills, Calif.

NEXT: Ahna O'Reilly

Actress Ahna O'Reilly attends A Night at Sardi's to mark the 20th anniversary of the Alzheimer's Association at The Beverly Hilton hotel on March 21, 2012, in Beverly Hills, Calif.

NEXT: "The Big Bang Theory" cast

Actors from "The Big Bang Theory", Kunal Nayyar, Simon Helberg, Melissa Rauch, Kaley Cuoco, Mayim Bialik and Jim Parsons, perform at the 20th Anniversary Alzheimer's Association A Night at Sardi's at The Beverly Hilton hotel on March 21, 2012, in Beverly Hills, Calif.

NEXT: Josh Radnor

Jason Merritt/Getty Images for Alzheimer's

Actor Josh Radnor performs at the 20th Anniversary Alzheimer's Association 'A Night at Sardi's' at The Beverly Hilton hotel on March 21, 2012, in Beverly Hills, Calif.

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