While we were balling out at the Roots Picnic (pics and video to come!), there was some drama going on at the Hot 97 Summer Jam. Nicki Minaj cancelled her performance as the night’s headliner after Morning Show host Peter Rosenberg expressed some not-so-kind words about her “Starships” single and its level of hip-hopness. YMCMB president Lil’ Wayne took to twitter to announce the cop out, Nicki herself proclaimed her displeasure with the situation, Rosenberg only offered a quasi-apology –in other words it got a little ugly. In messianic God’s Son-fashion, Nas –not the biggest Summer Jam fan himself at one point –stepped in to save the day with a spur-of-the-moment appearance. Not only did Esco have the crowd rocking out to his own joints, he even brought out the one and only Ms. Lauryn Hill to do her thing. Without wanting to pour any more fuel into this wildfire, “Ready Or Not” and “Lost Ones” might have been what Rosenberg had in mind when he was referring to that “real hip-hop sh*t.” In other Nas-related news, he recently revealed the artwork for his upcoming Life Is Good LP, which you can peep after the jump.