Buzz Bites (4/21/11): Watch A Sneak Peek Of Beyonce's 'Run The World (Girls)' Video

Credit: Splash News

+ Beyoncé released a promo clip for the upcoming video for her newest single, "Run The World (Girls)," which hit the radio today. Four words: Beyoncé on a horse. (Neon Limelight)

+ More Beyoncé! Check out the artwork for the single "Run The World (Girls)." The girl's got legs for days. (Idolator)

+ In another brave move, Demi Lovato, who's been opening up about her struggles with mental illness, reveals that she has bipolar disorder. "I never found out until I went into treatment," the singer told People magazine. (MTV News)

+ Remember when Rihanna had long brown hair? Didn't think so. Check out Buzznet's "Evolution of Rihanna" photo gallery and watch the good girl go bad. (Buzznet)

+ Congrats, Taylor Swift! The Recording Industry Association of America confirmed that the singer is making Gold and Platinum history with 22.5 million career digital song certifications to date. (ONTD)

+ TV On The Radio bassist Gerard Smith has lost his battle with lung cancer. Smith passed away Wednesday at the age of 34. (MTV News)