"The bars are full of souls so empty, " a barefoot Criolo sang in Central Park, wearing a yellow guayabera and white slacks, to an arm-waving crowd.

WSJ: Brazilian Rapper Criolo: From Favela to Summerfest

But Park In Sang, the president of the largest trade-union federation, wants a better deal.

ECONOMIST: Too many South Koreans are reluctant to change their ways

Psy (Park Jae-sang) is performing in Korea at 6:30 p.m. local time.

FORBES: This Weekend We'll See If Lightning Strikes Twice For Psy

One unexpected business bump from Psy's (also known as Park Jae-sang) has been to his father's company, Korean semiconductor company D I Corp.

CNN: Psy: One-hit wonder or K-pop breakthrough?

The pop star, whose real name is Park Jae-sang, also joked that he's heard that he is the first person to make a speech at Harvard without a written script.

NPR: Korean Pop Sensation Cracks Jokes At Harvard