Bobbi Kristina Brown has been given a spectacular ring by her brother-turned-boyfriend Nick Gordon.

Nick Gordon, 22, tweeted a picture of 19-year-old Bobbi Kristina Brown wearing the giant sapphire stone surrounded by diamonds yesterday, sparking rumors of an engagement.

It was accompanied by the caption: “Just a jewelry/gift for the sweetest thing in the world.”

Bobbi Kristina Brown responded by tweeting: “(: urthee best boo ! I love you, thank youuu (:(: surprise is right , i love it!”

Bobbi Kristina Brown has been given a spectacular ring by her brother-turned-boyfriend Nick Gordon

The spectacular jewellery is almost identical to the one worn by the late Princess Diana and now worn by Duchess Catherine of Cambridge.

Bobbi Kristina Brown and Nick Gordon lived together as brother and sister for more than a decade before Whitney Houston’s death.

Whitney Houston took Nick Gordon into her home at the age of 12 when his father went to prison and his mother was unable to take care of him.

Nick Gordon was the superstar’s unofficially adopted son, and she treated him like family up until her death.

Whitney Houston was found dead in a Beverly Hills hotel room on February 11, 2012.

The six-time Grammy award winning singer, died at the age of 48 due to an accidental drowning complicated by heart disease and cocaine use.

Nick Gordon first fueled rumors about a relationship with Bobbi Kristina Brown in a tweet written in March, shortly after Whitney Houston died.

He wrote: “Yea we got a little closer and what!!!”

The controversial couple have reportedly been sharing her $1.2 million Atlanta home together ever since.

By the age of 30 Bobbi Kristina Brown will have inherited everything that belonged to her iconic mother – mansions, jewellery, cars, and an extraordinary fortune.

She recently did a guest stint on Tyler Perry’s sitcom For Better Or Worse and is currently filming her upcoming reality show, The Houston Family Chronicles, which has been picked up by Lifetime.