1. Kurt Cobain, 46 The reclusive musician-turned-artist Kurt Cobain makes a rare appearance at New York City's Museum of Modern Art to view his friend Tilda Swinton's performance piece "The Maybe." A retrospective of Cobain's artwork opens early next week at the museum. 2. 2Pac, 42 Director Tupac Shakur and his wife Jada Pinkett Shakur arrive at the after-party for the premiere of Shakur's lastest film in New York City. 3. Freddie Mercury, 67 Larry Busacca/Getty Images for EJAF / Getty Images Sir Elton John, Katy Perry, and Sir Freddie Mercury attend the 20th Annual Freddy Mercury AIDS Foundation Academy Awards Viewing Party in Hollywood. 4. Amy Winehouse, 30 Amy Winehouse attends a group therapy session at the Priory Clinic in London where two years earlier she began treatment for her drug and alcohol addictions. Although busy being a new mom and a producer, Winehouse is committed to her sobriety and regularly attends many of the clinic's meetings. 5. The Notorious B.I.G., 41 Brooklyn Nets owners Jay-Z and Biggie Smalls are joined by Beyoncé and Puff Daddy at the Barclays Center in Brooklyn. 6. Aaliyah, 34 Singer, actress, and designer Aaliyah joins this season's cast of American Idol as a judge. 7. Jimi Hendrix, 69 President Barack Obama and First Lady Michelle Obama applaud musician Jimi Hendrix during the Kennedy Center Honors at the John F. Kennedy Center for the Performing Arts in Washington, D.C.. 8. Sid Vicious, 56 Sid Vicious, born John Simon Ritchie, peers out a window of New York City's Rikers Island prison. The former punk rocker is currently serving out a life sentence for the murder of his girlfriend Nancy Spungen in 1978. 9. Lisa "Left Eye" Lopes, 42 TLC rapper Lisa "Left Eye" Lopes joins the cast of Bravo's Real Housewives of Atlanta for its fifth season. 10. Jerry Garcia, 69 Jerry Garcia shares a photo from his Instagram account announcing a new Ben & Jerry's flavor in honor of his 69th birthday. 11. Ol' Dirty Bastard, 45 Music industry power couple Ol' Dirty Bastard and Lana Del Rey are spotted while signing autographs for fans. 12. John Lennon, 73 John Lennon and his wife Yoko Ono attend a dedication ceremony for a plaque commemorating the life of George Harrison in Liverpool.