Rihanna reportedly "threw up in a napkin" while partying in a Las Vegas club.

The star apparently spent the night clad in a red halter neck dress, dancing and drinking at the 1 OAK nightspot.

However, it appears the 24-year-old may have indulged in a few too many drinks.

"She threw up in a napkin. The guy with her handed her a white towel to clean up," a source at the club told British newspaper The Sun.

Despite the apparent mishap, the S&M singer was soon back on her feet, dancing with fellow R&B artist Ne-Yo.

Rihanna stayed at the venue until 5.30am, before heading to Spearmint Rhino strip club.

Just last week the songstress posted a picture of herself and a topless stripper on Twitter.

Rihanna's love of partying is legendary, with the star renting a yacht for her and a group of friends earlier this year.

Last month, she enjoyed a raucous night out in Beverly Hills where she was seen dancing on a table during a meal.