Country star Luke Bryan and R&B singer Jason Derulo teamed up for an unlikely virtual duet using a karaoke app called Sing! The duo covered Derulo's hit song Want You To Want Me, and each star posted the video of their performance on Instagram.com on Monday (10Aug15). Derulo and Bryan previously joined forces at the CMT Awards last year (14), singing a mashup of Derulo's Talk Dirty and This Is How We Roll, Bryan's collaboration with Florida Georgia Line.