The Wanted surprised fans at MixTape Festival when they joined NKOTBSB and 98 Degrees onstage.

+ It was a boy band extravaganza over the weekend at MixTape Festival in Hershey, PA. While The Wanted, 98 Degrees, New Kids on the Block and Backstreet Boys all performed separately, they surprised fans when NKOTBSB brought The Wanted and 98 Degrees on stage during their set. (MTV News)

+ Last night, Rihanna opened up to Oprah Winfrey during "Oprah's Next Chapter." The singer talked about her grandmother who recently passed away and Chris Brown, whom she now calls a "close friend," adding "We built a trust again and that's it." Watch the full episode. (Neon Limelight)

+ Madonna is being sued in Russia by a group who say they were offended when she advocated for gay rights during her concert in St. Petersburg. Madonna's support for the jailed female punk trio P---- Riot also angered conservatives there. (EW)

+ Between the recent photo of Kelly Clarkson making phone hand signals with Justin Bieber and Carly Rae Jepsen, and that she's been taking fan-requested covers, it was only a matter of time before we'd hear her take on "Call Me Maybe." Check out the sing-along. (Just Jared)

+ Fashionistas know just how anticipated Vogue's annual September Issue is (Lady Gaga graces this September's cover, making this issue über BIG). It's also extra special as Florence + The Machine's Florence Welch made its 120 List. (Just Jared)

+ Nicki Minaj canceled her scheduled appearance at U.K.'s V Festival over the weekend due to strained vocal cords. Her rep told MTV News, "After her most recent x-ray the doctor advises she rest her voice for a few more days." (MTV News)

+ Watch Marina And The Diamonds perform "Starring Role," "Lies," "Primadonna," and "Teen Idle" on the roof of New York City's The Mondrian Soho. (Idolator)

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