(Cover) - EN Showbiz - Rihanna ended her Loud concert tour with a "champagne bath."

The 23-year-old pop star wrapped up her final show in London on December 22.

Rihanna began touring in June of this year and has performed in sold out venues worldwide.

Thursday night was host to a unique celebration, as Rihanna purchased a dozen bottles of vintage Armand de Birgnac champagne for 3,600.

Rihanna along with her concert staff and crew crammed into her backstage dressing room.

The singer stripped down to her underwear and the festivities began when her comrades uncorked the bottles.

"Rihanna has always wanted to do this have a champagne bath or shower," a source told British newspaper the Mirror.

"She knows it was incredibly extravagant and saved it as a celebratory treat to mark the end of her tour it's not an everyday occurrence. The guys and girls who were doing the pouring in the bathroom of her private dressing room had a field day, it was only the gay boys who looked a little bored by the end."

Rihanna's new album Talk That Talk was released in November. (C) Cover Media