Oscar-winning composer A.R. Rahman says he was left “devastated” after hearing about Bollywood singer-composer Aadesh Shrivastava’s struggle against cancer. Shrivastava, whose cancer has relapsed for the third time, is undergoing treatment in Kokilaben Dhirubhai Ambani Hospital & Medical Research Institute here since the last 45 days. “Dear buddy Aadesh, I am devastated at hearing about your condition…Can’t come to terms with it. May god help you ease your pain,” Rahman tweeted on Friday.