The club was really going up on a Tuesday -- and also on Wednesday morning.
Drake and Rihanna were at Tape nightclub in London, England, for Nicole Scherzinger's 38th birthday party -- and they appear to have been the last ones to leave. The two were spotted separately exiting the establishment around 6 a.m. on Wednesday, just as the sun was coming up.
Rihanna was in a sexy pink party dress and teal sandals, and flashed a smile at photographers as she left Tape. Drake got a little goofy when the paparazzi spotted him, and jokingly covered his face.
The 29-year-old rapper and RiRi tend to spark romance rumors every time they hit the stage. While the 28-year-old singer sings "work, work, work, work, work," she loves to "twerk, twerk, twerk, twerk, twerk" up on Drake during their performances.
However, a source told ET that these two are not an item. "They are just friends," the source said. "They love messing around with people. They have a great friendship and definitely play the flirty game."
Here's a look at one of Drake and Rihanna's sexy performances of "Work":