Rihanna valentine's day dress singer chris brown hollywood blok nightclub

Could there be trouble in paradise for Rihanna and beau Chris Brown?

The gorgeous songstress arrived to Blok Nightclub on Valentine's Day without the R&B singer. Reports claim that these two are over.

Just a day ago, we caught both Rihanna and Chris arriving to Playhouse Nightclub ... but separately. A source from inside the club tells DailyMail:

    "Rihanna refused to sit with or even near Chris – and when Chris noticed she was there, he made a huge show of rubbing his presence in her face. He promptly ordered three more bottles of ace of spades which came out with in a procession of sparklers and scantily clad cocktail waitresses, causing a spectacle, which he clearly wanted Rihanna to see."

After ignoring each other the whole night, Chris left Playhouse at 2:15am ... and RiRi stayed partying until 3:00am.

The only photo Rihanna posted yesterday on Valentine's Day was the below image of what appears to be a marijuana plant and the following: "Roses are green! Somebody knows how to make me happy."

Seems like their relationship may be up in smoke.