Hollywood stars including Juliette Lewis, Bette Midler and Mia Farrow have voiced their sorrow following the death of actress Karen Black. The 74-year-old Easy Rider star passed away on Thursday (08Aug13) after a battle with cancer, and the news came as a blow to her many famous friends and fans. Natural Born Killers star Lewis, who was a longtime friend, helped spearhead a fundraising campaign to pay for Black to go to Europe to receive a revolutionary new treatment, and she has been left devastated by her pal's death. In a post on Twitter.com, she writes, "Karen Black was my mentor and a 2nd mother to me. She inspired everyone she came in contact with. Her spirit/strength my luv (sic) is beyond words." Actress/singer Midler also paid tribute to the late star, adding, "Karen Black, brilliant, unpredictable, dead at 74..." and Farrow posted a link to a video montage of Black's work, with the caption, "Wonderful Karen Black rest in peace." Other stars to offer tributes include actress Martha Plimpton, Sonic Youth's Kim Gordon, and Rainn Wilson, who called her a "vital, courageous person and actress".