Gigwise — It's not her new single... more info

MTV.co.uk News — Katy Perry hit Las Vegas over the weekend to celebrate her last night of freedom before she marries Russell Brand later this year.The California Gurls hitmaker was joined by the likes of Rihanna... more info

TMZ — Filed under: Katy Perry, Rihanna, Hot Vegas Katy Perry strapped a wedding veil to her butt this weekend for one last fling as a single woman -- at a bikini bachelorette party in Vegas with Rihanna and a bunch o... more info

ContactMusic — Katy Perry needs a "liver transplant" after partying with Rihanna for her bachelorette bash.The 'I Kissed a Girl' singer - who is engaged to Russell Brand - enjoyed... more info

Pop Crunch — Katy Perry celebrated one of her last nights of “Singledom” by hooking up with pop BFF Rihanna and taking on Las Vegas for a Hens’ Night that left her begging for a “liver transplant” the next morning on Twitter.The “Teenage Dream” sing... more info

ET Online — Katy Perry's weekend didn't get off to a great start with the arrest of her fiancé Russell Brand at the Los Angeles International Airport, but the pop star didn't let that stop her from having some fun with her girls in Las Vegas. ET has the pics fr... more info

Popeater — Filed under: Music News, Rihanna, Katy Perry The famous guest wore white, and bright red locks, to toast Katy Perry as she frolicked in Vegas this weekend with dozens of friends for her bachelorette party. The bride-to-be and Rihanna posed with Cirqu... more info

People.com — The singer and 25 pals, including Rihanna, mark her dwindling days of the single life more info

Yahoo! Music UK — world entertainment news - Rihanna is embroiled in a £3 million lawsuit from Brazilian concert promoters who claim they were conned into booking the singer for a string of shows. more info

ContactMusic — RIHANNA is embroiled in a $4.6 million (3 million) lawsuit from Brazilian concert promoters who claim they were conned into booking the singer for a string... more info