Ludacris's issues with Big Sean for allegedly stealing his rapping style have all died now thanks to the fac that both men are adult enough to sit down and address their issues with one another peacefully.  Ludacris did release a diss track aimed at Big Sean and Drake as well titled, "Badaboom," when he first felt as though Sean was jacking his style.  

However during a recent interview with Bootleg Kev, Kev asked Ludacris if he had gotten the chance to speak with Big Sean about their problems, and Luda confirmed that they had spoken and had no more issues with one another.  

"We actually did, and I believe he just addressed it on BET.  We had a show in Australia and actually got a chance to sit down."

Source: hiphopblog.com