Nas and Lauryn Hill on tour together has to be the hip-hop equivalent of the sentiment expressed by the first person to ever combine chocolate and peanut butter: How did this not already exist? Each a legend in his/her own right — Nas's Illmatic and Ms. Hill's The Miseducation of Lauryn Hill are classics of the highest order — the two are co-headlining the Life Is Good/Black Rage Tour, which takes its name from Nas's most recent record and a new song/spoken-word piece by Hill, respectively. Missing from the music world for a number of years, Hill has been performing more regularly of late and has debuted some new material this year. Nas, meanwhile, drops a new album every two years with flows as sharp and focused as ever. Upping the ante on both of them sharing a bill, their sets are backed by a full band.