Rihanna to Ba-rack Inaugural Ball

Rihanna is ready to rock Washington, D.C., on Inauguration Day. After Barack Obama is sworn in as president, the star will be singing for charity.

The 20-year-old Grammy winner and girlfriend of Chris Brown will headline the charity ball to benefit the non-profit Feeding America on January 20.

“We are thrilled to have Rihanna participate in the inauguration charity ball,” Feeding America spokeswoman Vicky Escarra told Access Hollywood.

“As the prevalence of hunger in America increases at an unprecedented rate, we are most grateful to Rihanna and to the RIAA for helping us bring greater visibility to this tragic reality and helping us feed millions more people in need.”

Performing to help raise money to benefit the less fortunate in January, Rihanna will no doubt leave fans hungry ... for more hit songs and outfits like this!