Katy Perry's Vegas Bachelorette With Rihanna (PHOTOS)

Katy Perry's best friend Rihanna joined her in Las Vegas for a bachelorette celebration Saturday night. Perry is engaged to actor/comedian Russell Brand.

They took in a performance of 'KA' by Cirque du Soleil at the MGM Grand Hotel and posed backstage with cast members, seen below. Perry wore a veil piece attached to her head. Earlier in the day they partied with 25 people at the pool.

Later they went drinking, as Perry tweeted, "Signing up for a liver transplant now..."

PHOTOS:

Comments

[MsNatTurner]

04:47 PM on 09/21/2010

This doesn't look like it was fun at all. Look at ya girls' faces in the last photo.
Really? They're both multimillionaires and that's the best she could come up with?
She should have rented a spaceship, or surprised KP with invisibility serum. I coulda bought tickets to a show...

[dlvme2]

04:22 PM on 09/21/2010

Rihanna is a beautiful woman - her face, body - just lovely! not sure what I think of the red although it does look good on her and frankly I prefer her hair when it is longer. The thing is she has such a petite little face she can wear any hairstyle. I wish her luck and peace in her life she went through an ordeal that was very difficult.

[LovelyGirl]

03:44 PM on 09/21/2010

When did they become best friends?

[Max Shaw]

02:42 PM on 09/21/2010

Katy Perry is wearing such a Grandma outfit....I think she has an unhealthy obsession with candy-coated vinyl and sequins-laced outits..

[Cowoak]

07:27 AM on 09/21/2010

Those two have the kind of legs I love. Feet on one end and va j j on the other:)

[Lilly-G]

11:46 PM on 09/20/2010

Rihanna's hair takes some getting used to. She is the rare woman who actually looks better in short hair.

[Big0725]

08:04 PM on 09/20/2010

I'd love to be the creamy filling in that cookie.

[Hugh Briggs]

06:57 PM on 09/20/2010

Damn Rihanna is such a dream girl. WOW. Love looking ladies both of them.

[Puffin16]

03:59 PM on 09/20/2010

I think the bachelorette party might have lasted longer than the marriage will.

[logic123]

03:31 PM on 09/20/2010

Seems Rihanna stole the spot light at Katy's bachelorette party....

[mokachyna]

04:28 PM on 09/20/2010

I was thinking the exact same thing!

[YouDisgustMe]

11:31 PM on 09/20/2010

lol...gonna have to agree

[KeepNIt2Real]

01:45 PM on 09/20/2010

Didn't Kate Perry admit to selling her soul to the devil? Now she's hanging with Rihanna, another girl who's done the same? I guess the saying is true after all...

[YouDisgustMe]

11:32 PM on 09/20/2010

how about you stop being psychotic? thanks.

sincerely,
management

[Jackie Dillard]

11:15 AM on 09/21/2010

LMAO hahahahahaha that was sooo funny!

[Lilly-G]

11:47 PM on 09/20/2010

No, Katy's actually very religious, her father is a preacher.

[Uproar]

01:16 PM on 09/20/2010

Oh Rihanna, still wearing those attractive yet daring little numbers from Cache at the mall. Ever the stylish one.

[YouDisgustMe]

11:32 PM on 09/20/2010

????

[JFaye]

12:36 PM on 09/20/2010

Rihanna is an amazingly beautiful woman ... wish her peace and joy.

[johnnycmlately]

11:36 AM on 09/20/2010

Either one will do me just fine.

[America08]

11:30 AM on 09/20/2010

Ree Ree looks so cute!