The pop superstar is one of several acts scheduled to perform Saturday night at a Los Angeles concert celebrating the 10th anniversary of the foundation founded by Clinton, who ditched his unhealthy eating habits for a "plant-based diet" after undergoing a quadruple bypass in 2004 and receiving stent implants to open one of the arteries from that surgery in 2010.
"In deference to my diet, she'll be going meatless that night," Clinton joked of the envelope-pushing artist, who donned a dress made of raw meat at the MTV Video Music Awards last year. "She is the most talented person though - even if you're an old fogey like me," he told David Letterman on Wednesday night's show.
Other artists set to perform at "A Decade of Difference: A Concert Celebrating 10 Years of the William J. Clinton Foundation" include R&B singer Usher, country star Kenny Chesney, Somali rapper K'Naan, Colombian crooner Juanes and rockers Bono and The Edge of U2. Ticket prices for the event, which will be streamed online by Yahoo, range from $50 to $550.
Clinton himself is no stranger to performing. The saxophone-playing politician memorably belted out "Heartbreak Hotel" when he visited Arsenio Hall's show during his 1992 presidential campaign. For the past decade, Clinton's foundation has sought to improve global health, strengthen economies worldwide, promote healthier childhoods and protect the environment.