The Brit Awards will take place at the O2 Arena in London later this month and Bieber has been given a Triple A access pass and permission to see the Barbadian beauty at the show.
A source said to UK newspaper Daily Mirror: 'Justin 100% confirmed his attendance last night, after being assured he'd get an access all areas wristband and some time with Rihanna.
'He has a huge crush on her and thinks she is amazing. As he's not performing on the night, he didn't want to risk not getting to hang out with her.
'So it's been agreed that he'll go backstage and get a private audience. Justin is really excited.'