Chris, 25, was spotted at Eminem's Monster tour, which 26-year-old Rihanna is also currently performing on.
READ: CHRIS BROWN 'OBSESSED' WITH KARRUECHE TRAN AND RIHANNA
According to sources, Chris is desperate for a reconciliation with Rihanna and, after watching the show, snuck backstage to spend some time with her.
An insider told the Mirror: "Chris turned up to the second show and watched it from the crowd, but he made his way backstage after the gig was finished to be closer to Rihanna.
READ: KARRUECHE TRAN OPENS UP ABOUT 'BATTLE' WITH RIHANNA
"He was making a huge effort to see her and be seen with her again. He's been texting her loads since he got out of prison last month and she is part of the reason he broke up with Karruece. He's drawn to her and believes they should be together."
Rihanna previously said something along the same lines, telling Oprah: "We loved each other and we probably always will."
Fans will remember that back in 2009 Chris violently assaulted Rihanna, resulting in their split and a restraining order put in place.
READ: KARRUECHE TRAN CONTINUES ANTI-BODYSHAMING CAMPAIGN WITH STRETCH MARK BELFIE
Despite this, Chris said last year he's 'always gonna love that person… It's always gonna be love'.
Chris and Riri publicly got back together briefly in 2013, after he featured on the song Nobody's Business for her seventh album Unapologetic.