Rihanna and Drake really work it on out in this sexy new preview for the single "Work." Hot!

The rumored-to-be former lovers bump and grind in the clip, further fueling rumors the two may still be hooking up. RiRi twerks up against the rapper, surrounded by scantily-clad club-goers.

Rihanna's been in the news recently for canceling her Grammys appearance at the last minute and for postponing her Anti world tour -- both due to illness.