Sometimes the camera isn't a star's best friend. Whether they're grimacing or giggling, yawning or scowling, these celebs have been caught at those most awkward of moments. Here, who knows what actor Tom Hanks was doing at this photocall promoting the film The Da Vinci Code at the Palais during the 59th International Cannes Film Festival?

A stern-looking Jeff Goldblum attends the re-launch of Triggerstreet.com at the Social Hollywood on June 15, 2006 in Hollywood, California.

A tongue-wagging Joey Fatone arrives at the Los Angeles Confidential pre-Oscar party at SkyBar in Los Angeles, California.

Actress Dominique Swain makes a truly lovely face as she arrives at the 6th Annual Beverly Hills Film Festival at the Writers Guild of America Theatre in Beverly Hills, California. At least her teeth are white.

Is that a desperate Teri Hatcher promoting her book "Burnt Toast: And Other Philosophies of Life" at Waterstone's two years ago in London?

A typical Jack Black moment, at the premiere of Nacho Libre held at the Grauman's Chinese Theatre in Hollywood, California.

Actress Jennifer Aniston, not looking so friendly on the red carpet at the UK premiere of The Break-Up at Vue West End, Leicester Square in London, England.

Don't think anyone asked Elisabeth Shue to show us her tonsils at the Hollow Man premiere, but hey, thanks for the shot!

Hmm. Something really must be stumping singer/actress Jessica Simpson, on MTV's Total Request Live in New York City.

Actress Roselyn Sanchez, winking--or something--at Conde Nast's Third Annual Fashion Rocks Concert at Radio City Music Hall in New York City.

Someone must have asked Jude Law what his last hit was, here at the Toronto International Film Festival presentation of Breaking and Entering.

Entourage actor Rex Lee gets silly at the opening night of Sweet Charity at the Pantages Theater in Los Angeles, California.

Actor Sacha Baron Cohen appears in character as Kazakh journalist Borat Sagdiyev at a press conference and photo call for Borat in Melbourne, Australia.

Comedian Carrot Top's face isn't the only funny-looking thing about this shot taken on the red carpet at the 2006 Billboard Music Awards at the MGM Grand Garden Arena in Las Vegas.

They're cute, they're mugging, they're Heroes stars Masi Oka and Hayden Panettiere, backstage during the 33rd Annual People's Choice Awards at the Shrine Auditorium in Los Angeles, California.

Actress Rinko Kikuchi shows some tongue upon arrival at the 12th Annual Critics' Choice Awards held at the Santa Monica Civic Auditorium.