Jordin Sparks and Jason Derulo

Jordin Sparks and Jason Derulo

Jason Derulo isn't "insecure" about Jordin Sparks' success.

The 'Other Side' singer - who has been dating the former 'American Idol' winner for two years - admits it takes a lot of "confidence" to go out with his pop star girlfriend, but he isn't intimidated by her fame.

He told Cosmopolitan magazine: "Going out with a woman as successful as Jordin takes a lot of confidence for a guy. You have to be sure in yourself to deal with it. I feel I can still be that protective figure without feeling insecure about what she does."

The 23-year-old star reveals that he was something of a womaniser prior to his relationship with Jordin, 23, but suffering a broken neck during tour rehearsals in 2012 helped him put everything - particularly his romantic life - into perspective.

He explained: "Before the accident, I was more reckless in relationships. I was a guy in my early twenties having fun. I wasn't really looking for love, but my injury woke me up.

"Jordin and I had been friends for a long time and I definitely liked her. The injury made me pay attention - it was like someone saying, 'Hey, wake up!' "

The 'In My Head' hitmaker insists his girlfriend is "the one" and hopes to one day tie the knot with the singer.

He added: "Marriage will happen at the right time."