(Cover) - EN Showbiz - Rihanna and her entourage have asked disgruntled cruise line staff members to join her all night parties.

The singer is currently on a holiday cruise boat named the Mediterranean Sea with several of her friends.

Rihanna has reportedly been disturbing the crew with her incessant festivities.

The star invited everyone to a karaoke night and people had a blast belting out Whitney Houston, Katy Perry and some hip-hop tracks.

"It seems Rihanna and co have been trying to make it up to the yacht staff for all of the late nights and running around they've been doing," a source told British newspaper The Sun.

"They had a great time. She also taught them some of her dance moves."

According to the publication, Rihanna and her pals have consumed a lot of alcohol. Her tab apparently included "25 bottles of gold Armand de Brignac Champagne, 60 bottles of Peroni and Corona and ten bottles of tequila".

Rihanna has been using her Twitter page to update fans on her sunny escapades. The stunning singer took to the social networking site to share her musings about her recent travels.

"Why see the world, when you got the beach? (sic)," she teased. (C) Cover Media