Jay-Z & Mary J on Letterman Show

Rapper Jay-Z and R&B singer Mary J Blige appeared on Friday night's "Late Show With David Letterman". The duo is currently headlining the "Heart of the City" tour which is sweeping the nation. Dave opened by asking if Jay and Mary were looking to get married, but Jay said it couldn't happen since Mary J is already married. Mary J noted that she first met Jay-Z when they did "Can't Knock the Hustle" on Jay's Reasonable Doubt album, and they've been friends ever since. Jay said they've been friends for a while and have no problems on the tour, and food tends to help prevent problems. It also came up that this tour came about after some tension between Jay-Z and R Kelly on a previous tour. Dave asked what R Kelly did to create havoc and tension while on tour. Jay-Z remarked about one St. Louis show where R Kelly walked off stage and into the crowd. Jay said he thought it was a cool trick Kelly was doing as part of the show, but then when the camera showed R Kelly on the big screen it was a different story. R Kelly began arguing with a lighting person out in the crowd. According to Jay after the altercation, R Kelly went back on stage again briefly, then left to work at the drive through at a nearby McDonald's. Backed by a live band, Jay & Mary performed their classic song "Can't Knock the Hustle" to finish off the Letterman show as well.