Stereogum — As a little preview of their upcoming stadium tour that starts in a week, Rihanna joined Eminem on stage during his headlining set at Lollapalooza. The frequent collaborators performed “Monster” and “Love The Way You Lie” and, more surprising... more info

NME — Pair perform their two hits and 'Stan' before next week's joint tour more info

TMZ — Rihanna and her apparent BFF Eminem performed some of their hit songs together at Lollapalooza Friday night ... but the show stealing moment was their rendition of "Stan."It all went down during Em's headlining gig at the end of the first day of the�... more info

The Daily Mail — Over the years, she's developed quite the reputation for keeping things hot and steamy. more info

TMZ — ON TODAY'S SHOW Zac Efron's Crazy Make Out Session with Michelle Rodriguez Chris Brown DUMPED Because of Rihanna Bryan Singer Needs to Choose His Words More Wisely Justin Bieber Loves His New Tough Guy Image SKYPE US TMZTVSHOW TWEET US Tweet to… ... more info

TMZ — Chris Brown played the Rihanna card one too many times with Karrueche Tran ... we've learned Karrueche has not only broken up with him ... for safe measure she changed her number.Our sources say Karrueche exploded when Chris recently… more info

The Telegraph — The Guardians of the Galaxy star sings Rihanna, dances to Katy Perry, and models an elephant more info

Stereogum — Vin Diesel’s gravelly, marblemouthed voice is an absolute natural wonder, which is presumably the reason he’s playing the voice of the walking alien tree Groot in the new Marvel movie Guardians Of The Galaxy. Last year, a video of Diesel singing ... more info

MTV.co.uk News — Zane Lowe talks weird MySpace messages and 5am calls with Chase & Status on this Sunday's episode of Soundchain... more info

The Daily Mail — She isn't afraid of wearing daring clothes - if barely any at all. Yet Rihanna has gone one better by wearing a pair of men's boxer shorts as outer-wear for an evening out in New York. The Unapologetic singer was exactly that as she stepped out in Ma... more info