Nelly’s schoolyard rhymes are delivered with the skill and verve of a seasoned entertainer. The knowing entendres of “Thicky Thicky Girl” and “Ride With Me” trade on the type of joyously leering come-ons that have been an essential component of R&B since its inception. A truly accomplished debut, Country Grammar cloaks its old school R&B roots in enticing pop production and a contemporary lyrical sensibility.