The Stars Come Out for Operation Smile

At the 25th annual Operation Smile Gala in Beverly Hills on Friday, Jessica Simpson stopped to talk to OK! about her involvement with Operation Smile.

“I got involved with this charity through my hairdresser and my best friend, Ken Paves," the Blonde Ambition star explained to OK!. "A smile is contagious. It's the absolute reason why I'm here. If you're internally happy, then your heart's smiling. I visited these kids in Kenya and I watched them smile without being able to but you could read it in their hearts.”

And what makes the pop singer turned actress smile? “Being here tonight. Having the opportunity to make someone else smile.”

Model/actress Molly Simms, who recently traveled to Peru with pal, actor Justin Chatwin, for the organization, was singing the same tune when OK! asked her what turns her frown upside down. “Operation Smile!” she said.