Jordin Sparks is "so proud" of her boyfriend Jason Derulo for his success with "Dirty Talk" after breaking his neck two years ago. Jordin Sparks also revealed that her weight loss efforts have resulted in shedding 50 pounds for 2014!

ET's Brooke Anderson caught up with Jordin Sparks at the Kentucky Derby Ladies Luncheon in Los Angeles, where the 24-year-old "One Wing" singer dished on her three-year relationship with boyfriend Jason Derulo, 24.

ET asked Jordin Sparks how she feels about Jason Derulo's success with his hit single "Talk Dirty."

"It's incredible," Jordin Sparks said. "I'm so proud of him because you know, he broke his neck two years ago, [and] to see from where he was to where he is now. ... His song went to number one, and he's touring around the world. I'm just so proud."

Jordin was referring to her boyfriend Jason Derulo's near-fatal, neck injury. On Jan. 4, 2012 Derulo announced on his Facebook page that he had suffered from a neck injury.

"I fractured my neck doing tumbling & acrobatics 4 tour! Always trying 2 push boundaries 4 YOU! Like my new chain?"

Derulo experienced an acute fracture to his vertebra after falling on his head, Yahoo! Music reports.

"My injury is called a 'Hang Man's Break' because it is the same bone that is broken when someone is hung!" he wrote. "I am so blessed to still be here! 95% of ppl with the same injury end up paralyzed or gone. Everything happens for a reason. Traumatic experience can change you for the better. My outlook on life is so much clearer! Don't forget what's important. Life is short so do it today, today could be a day too late!"

Derulo said that girlfriend girlfriend Jordin Sparks "was very instrumental in my recovery," he told E! "That situation brought us very close because I think it takes a very special person to drop everything they've got going on in their life, especially someone of her caliber, to come and aid me. That was really special."

Meanwhile, Sparks told Today's Jenna Bush Hager that her recent weight loss efforts were successful because she made her health a priority, E! News reports. "I was comfortable with how I looked before, but it was about really focusing on become healthier," Jordin Sparks said. "And then my body changed, which was awesome. But it wasn't about being a size zero, or anything like that."

Through exercise and changing her diet, Jordin lost an incredible 50 pounds in 18 months, according to E! News.

"I fluctuate a bit. I go anywhere from 155 to 161," she said. "There we go! There it is in a box, in a nutshell, right from my mouth. That it is how much I weigh, and I'm okay with it. It feels really good," the five-foot-ten beauty said with a smile.