Celebrity Smooches

Jan. 27, 2008: Angelina Jolie and Brad Pitt kiss at their table during the 14th annual Screen Actors Guild Awards in Los Angeles. So, why does kissing feel so good? Researchers from Lafayette College in Pennsylvania may have uncovered the answer. They found lip-locking actually sparks an increase of hormones in the brain. Due to a series of complex chemical processes, those involved in kissing experience a combination of relaxation, excitement and love, according to the study.

Reuters

June 20, 2008: Actresses Ellen DeGeneres and Portia de Rossi kiss after DeGeneres wins outstanding talk show host for "The Ellen DeGeneres Show" at the 35th Annual Daytime Emmy Awards at the Kodak theatre in Hollywood.

Reuters

May 2, 2008: Harry Hamlin shows his wife Lisa Rinna a little love as they walk the runway for designer Tommy Hilfiger during the 15th annual Race to Erase MS gala in Century City, Calif.

Reuters

Nov. 15, 2007: Seal kisses his wife, model Heidi Klum, after performing a duet at the Victoria's Secret Fashion Show 2007 in Hollywood.

Reuters

July 23, 2007: Jennifer Lopez and husband Marc Anthony kiss as they arrive at the world premiere of their movie "El Cantante" at the Raul Julia Theater in the Puerto Rico Art Museum in San Juan.

Reuters

Oct. 10, 2008: Tim Robbins kisses actress Susan Sarandon as he is honored with a star on the Walk of Fame in Hollywood.

Reuters

June 29, 2005: Famous for locking-lips on the red carpet, Tom Cruise kisses Katie Holmes at a special Los Angeles fan screening of "War of the Worlds" in Hollywood.

Reuters

June 12, 2008: Jada Pinkett-Smith kisses husband Will Smith as the Los Angeles Lakers play the Boston Celtics in Game 4 of the NBA Finals basketball championship in Los Angeles.

Reuters

Feb. 3, 2008: France's first lady Carla Sarkozy kisses President Nicolas Sarkozy at a cafe terrace in the gardens of the Versailles Chateau near Paris, the day after they were married at the Elysee Palace.

Reuters

Jan. 21, 2009: The U.S. President also likes to to lock lips with his wife. President Barack Obama and first lady Michelle Obama kiss at the Eastern Inaugural Ball in Washington, D.C.

AP