Jay-Z 'To Join Rihanna On Stage At London Gig Tonight'

Jay-Z is set to make a special guest appearance at Rihanna's secret gig in London tonight, it's been reported.

The pair are expected to team up at the Brixton Academy on a rendition of Jay-Z's hit 'Run This Town'.

There is also speculation that Kanye West, who is also in the capital, will reprise his part on the song.

West made a surprise appearance during Beyonce's gig at the O2 Arena last night.

The rapper performed 'Ego' with Beyonce in what was his first public performance since his infamous outburst at the MTV VMAs in September.

A source told The Sun newspaper that Rihanna was plotting a “star-studded event” for tonight's gig.

Fans not in attendance will be able to watch the singer's show live online.

Rihanna is currently promoting her new album 'Rated R', which is released later this month.

MTV VMAs 2009