Nelly, the famed rapper of the St. Lunatics, has recently took upon a new role as a judge/mentor on CW's singing competition The Next. In the above footage, the Country Grammar rapper makes a surprise visit as aspiring singer and YouTube star Baiyu performs in front of a crowd at New York City's Tammany Hall. The Chinese-American singer, whose cover songs rakes in millions of views on YouTube, will make her national television debut on The Next, but before, Nelly will guide her for 72 hours. Sounds exciting for the singer and the rapper. —XXL Staff (@XXL)