Usher's girlfriend spotted wearing engagement ring

Usher has reportedly got engaged.

The 36-year-old singer has sparked speculation he's popped the question to his girlfriend-turned-manager Grace Miguel after the brunette beauty was spotted wearing an engagement band on her ring finger during a date with Usher in Miami, Florida, over the Christmas period last month, according to LoveBScott.com.

The news comes as no surprise to fans as the star, who has been dating Grace since 2009, gushed about his beau during a recent interview and praised her for helping him get through tough times.

He told Billboard magazine: "I have an incredible partner and manager. She has helped me through some of the hardest times in my life and my career.

"She's someone who's been able to support and understand all of who I am. Not just as a dancer or as a performer or as a singer, but as a humanitarian and a business man and as a person."

Usher has walked down the aisle before - when he tied the knot with Tameka Foster - his former personal stylist - in a civil ceremony in Atlanta in August 2007.

However, the former couple - who have sons Usher 'Cinco', seven, and Naviyd, six - separated just two years later when Usher filed for divorce in 2009.