Nowadays, Miami-born Jason Derulo has a greater appreciation for his R&B/pop career, particularly after an unexpected vertebrae injury during rehearsals for his 2012 tour. The painful accident sidelined him for several months and led to the cancellation of all of the scheduled concerts supporting his sophomore set, “Future History.” Now Derulo is selling tickets for headlining shows behind his third album, “Tattoos,” which hit retailers in Sept. 2013 and includes special guests 2 Chainz, Jordin Sparks, Pitbull and The Game.   After a performing arts school education, Derulo began writing songs for already-established acts like Lil Wayne, Pitbull, Birdman and Diddy before releasing his own work on his 2010 eponymous debut. Opening for Lady Gaga’s “The Monster Ball Tour” and the Canadian portion of The Black Eyed Peas’ “The E.N.D. World Tour” helped solidify his place in the dance/pop world, as well as his chart-climbing, soul-laced pop singles “Whatcha Say” and “Ridin’ Solo.”