3. Jason Derulo's First Ever Single Released Was The Mega Hit 'Whatcha Say'. This image appears in the gallery:Jason Derulo: 20 Things You Didn't Know 3. 3. Jason Derulo's First Ever Single Released Was The Mega Hit 'Whatcha Say'. The R&B star arrived onto the music scene with his catchy debut single back in August 2009. 20 images See the full gallery: Jason Derulo: 20 Things You Didn't Know