Rihanna has left her manager and signed to the Jay-Z owned management company, Roc Nation.

The singer said she was “so excited” about the move, which reunites her with the rapper who signed her to Def Jam in 2005.

As part of the deal, Rihanna has launched her own company, Rihanna Entertainment, which will encompass hermusic, film fragrance, fashion and book ventures.

Roc Nation also oversees The Ting Tings, Mark Ronson and Willow Smith, the daughter of Hollywood actor Will Smith.

Meanwhile, Rihanna is due to release her latest studio album 'Loud' on November 16.

The follow-up to 2009's 'Rated R' includes guest appearances from Drake, Nicki Minaj and a reported collaboration with Katy Perry.

(by Jason Gregory)