Rihanna can wear just about anything (or nothing at all) and still look amazing!

The sexy songstress arrived at the grand opening of Jay-Z's 40/40 nightclub in Brooklyn's Barclays Center wearing what looked like cream-colored pajamas. RiRi accessorized the silky look with brown heels and gold accessories. So chic!

Beyonce's hubby already has a 40/40 Club in the city ... and now the arena will have it's own outpost.

Chris Brown's ex released her latest single, "Diamonds," earlier this week, and we're lovin' it. This girl's schedule is bananas!