J. Cole's debut has only been out since yesterday (Sept. 27), but sales have already been brisk. According to Hits projections, 'Cole World: The Sideline Story' is on pace for opening week sales between 225,000 and 250,000 -- no small feat, given the current state of the music business.

This is good news for Jay-Z's Roc Nation label, which made the 26-year-old MC its first signing nearly two years ago. Cole has been building buzz ever since, dropping mixtapes and EPs, guesting on other artists' tracks and touring with Rihanna, with whom he was rumored to have had a fling with but he's since squashed the talk.

Cole marked the album's release in New York City, where he went on w promo blitz that included a rooftop performance, an interview with Hot 97's Angie Martinez -- his first time being on her show -- and an album signing at J&R Music World.

Though he was busy with fans, he took time to let his Twitter followers know that they could purchase the LP digitally due to many stores -- including locations in his hometown of Fayeteville, N.C. -- selling out fast. "Yall sold out so many stores today. Itunes it for now, stores will re-up tomorrow. We on pace. Much Love!" he tweeted. "Had a crazy day, so I missed a lot of yall love I'm just now hearin about. Overwhelming. Thank you! #coleworld."

The BoomBox followed J. Cole during his hectic day. Stay tuned for our Day in the Life feature with the 'Can't Get Enough' creator.