Rihanna rides the tube for LOLs

Rihanna has been spotted on the London Underground.

The singer took the tube to her show at the O2 in London – apparently because she thought it would be funny.

“She thought it would be funny. Her people agreed, so she popped down to the tube, bought a travelcard and shocked the life out of a few hundred rush hour passengers,” a source said, reports ShowbizSpy.

“She was just like any other passenger, except accompanied by a huge entourage. She was happy to pose for snaps and talk about the gig. She was so down to earth.

“Fans couldn’t believe they were sharing a carriage with a world famous pop star.”