Rihanna Had "Flirty Dance Off" With Usher At Coachella

Plus, RiRi is allegedly planning a "girls only" trip to Vegas with Katy Perry...

Rihanna was reportedly spotted having a "flirty" dance off with R&B star, Usher, at a Coachella festival party last weekend.

According to US OK! magazine, RiRi and the OMG singer hit the Armani Exchange and 944 magazine party - Neon Carnival - on Saturday evening, where they allegedly did battle on the dance floor.

SEE RAUNCHY PICS OF RIHANNA IN MTV'S GALLERY HERE!  

A source told the publication: "Usher requested a table next to Rihanna. She arrived before Usher, with her bodyguards. Then a bit later Usher and his entourage arrived.”

The onlooker claimed the S&M hitmaker and Usher "mingled" the whole night, at one point even throwing some shapes together.

Speaking of their dance battle, the witness revealed: "Usher and Rihanna were having a dance off. The crowd was going crazy, circling around them and cheering them on, with members of each celeb’s crew jumping in to take a turn.”

We wish we had been there, our money would have definitely been on RiRi! In other Rihanna news, the 23-year old star is said to be planning a trip to Las Vegas with pal, Katy Perry.

CHECK OUT SNAPS OF RIHANNA LIVE IN MTV'S GALLERY HERE!  

The duo allegedly "can't wait" to go on holiday together and despite Perry being married to funnyman Russell Brand, they have insisted their vacation will be a man-free zone.

A source told More! magazine: "They’re going to take over the top suite at the plush Bellagio Hotel. As soon as they both have a break in their schedules, they’re off, and they can’t wait! They’ve told the men in their life it’s strictly girls only.”

They added: "There’ll be no expense spared. As well as all-night partying, they’ll also have a masseuse team to treat them to whatever they want."

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