MTV.com News — Provocative image of singer posing topless surfaces on the Web.By Jocelyn Vena Rihanna's "Wait Your Turn" cover art Photo: Island/ Def Jam Rihanna looked full of confidence on Sunday when she took the stage with Jay-Z in Los Angeles, but o... more info

Perez Hilton — The comeback is in full swing! Rihanna made a surprise appearance last night at Jay-Z's concert at UCLA! The performance marks the first time in a LONG, LONG time that RiRi's sang live. And she sounded amazing! Check out her performance with Jay-Z of... more info

VH1 News — Rihanna surprised fans by taking the stage with Jay-Z for two songs at his concert in Los Angeles on Sunday. more info

MTV.com News — Singer collaborates with Jay-Z for 'Run This Town,' then performs new single 'Hard.'By Jocelyn Vena Rihanna (file) Photo: Chris Gordon/Getty Images Justin Timberlake, Jessica Biel and Jamie Foxx all showed up for Jay-Z's concert Sunday nig... more info

Rolling Stone — • U2, Jay-Z Team Up at MTV Europe Awards • Rihanna Details Chris Brown Assault on GMA • Zemeckis Wants Beatles for Yellow Submarine • Weekend Rock List: New York City Songs • Jackson Doctor Speaks About Star’s Drug Use • Pixies Rock Doo... more info

AngryApe — Despite her singing about the rap star more info

Musicaddictz - Addicted To Music — Empire State Of Mind (Live @ World Series 2009 at Yankee Stadium) - Jay-Z ft. Alicia KeysNote: What a great performance!!! It's like saying 'OMG! Wow!' for about 5 minutes. Enjoy and Drop Some Comments Please! more info

L.A. Times - Entertainment — It s enough for the 25-year-old to handle opening for Jay-Z and N.E.R.D., but he s simultaneously in breakneck promotional mode for Attention Deficit, his official debut that drops Tuesday. more info

Culture Bully — Jay-Z performs a pair of songs on the Nov. 3 edition of Later. more info

AllHipHop — Miley Cyrus drew headlines when she name checked Britney Spears and Jay-Z in her hit single “Party in the U.S.A.,” but the pop singer has admitted she has never heard a record by the rap superstar.   The track, which was produced by Luk... more info