During his 'Black Friday' swap with Kendrick Lamar yesterday, J. Cole teased that he was dropping something in February. He didn't make clear what he was putting out, but a new clue from Lamar's sister suggests it's a collaboration between Cole and Kendrick.

She let the cat out of the bag on Instagram, but quickly deleted it.  WatchLoud was able to get  a screenshot of her insider's reveal. The message says a collab drops February 16, but still is very vague. Is it one song? The long awaited album between the two? I'm guessing more information will pop up sooner than later.