Singer Kelly Rowland has sparked rumours she is set to marry her boyfriend Tim Witherspoon after showing off a diamond ring on her wedding finger during an online video.

The former Destiny's Child star has been dating her manager for several years and has managed to keep the relationship out of the spotlight.

However, Rowland unintentionally sent gossips into a spin when she uploaded a birthday message video for the son of her producer friend Patrick 'J. Que' Smith on Friday (15Nov13), showing off a huge diamond band as she blew him a kiss.

Rowland was previously engaged to American football player Roy Williams in 2004, but they called off their wedding the following year (05).