Ready to take his relationship to the next level, Nick Carter popped the question to his longtime girlfriend Lauren Kitt earlier this week.

The 33-year-old former Backstreet Boy got down on one knee in the Florida Keys amongst a group of friends and family, where he presented his lady with a six carat sparkler.

Surely one of the most heart-wrenching gigs of his career, a grieving Nick Carter took the stage at NYC's Irving Plaza on Thursday (February 2) - just two days after the sudden death of his sister Leslie.

Visibly emotional following the shocking event, the "Backstreet Boys" singer held back tears as he dedicated "Falling Down," a ballad, to his late sister.

It was a tragic loss when Leslie Carter passed away unexpectedly yesterday (February 1), and her family and friends are pretty sure her untimely demise was related to prescription drugs.

According to an inside source, the 25-year-old “House of Carters” starlet was living with family members in hopes of kicking her addiction to pills, including Xanax.