Sep 20, 2010 14:36 GMT  ·  By

After seeing her boyfriend under citizen’s arrest over the weekend and then charged with battery, Katy Perry got to have some fun as well, as her friend Rihanna threw her a bachelorette party.

Katy is engaged to British comedian Russell Brand and will soon tie the knot in a ceremony that will most likely take place in India.

Rihanna was named responsible for throwing her a bachelorette party, which is precisely what she did, whisking the “I Kissed a Girl” hitmaker for an entire weekend of fun, People reports.

The party took place at Las Vegas’ Hard Rock Hotel Beach Club, where Katy and her entourage met up with Rihanna and got their party on almost instantly.

Katy “arrived at Las Vegas’ Hard Rock Hotel Beach Club pool with an entourage of 25 who included Rihanna and inflatable objects consistent with bachelorette parties,” People says.

“Lounging in the VIP cabana in 95-degree temperatures, the group went largely unnoticed while sipping champagne, beer and vodka and munching on finger foods,” the mag further notes.

“Perry, wearing a white bikini and sunglasses, appeared at ease, but she may have been bracing for a bit more drinking later in the night. Shortly after arriving at the pool, she Tweeted, ‘Signing up for a liver transplant now’,” the report goes on to say.

After the pool party, the bride-to-be, Rihanna and their entourage hit Cirque Du Soleil’s KA at the MGM Grand Hotel / Casino and then went out to dinner, People then says.

“Following dinner at Ago, the group headed to XS nightclub, where they sat in a VIP table. Perry, wearing a sparkling black cocktail dress and miniature top hat with a veil, sat with Rihanna, remaining low key, sipping Grey Goose,” the magazine writes.

As they say, the night still being young, the group then went to Sapphire, a club with exotic dancers, where Perry was seen “checking out” female dancers dancing on her songs.

At one point, she disappeared to a private booth with a blonde dancer, where she was reportedly entertained in private, away from the prying eye of the media, the same report concludes by saying.