By Emma Dooney Imelda May has paid tribute to the late Sinead O’Connor on her birthday, which falls on the same date as the funeral of Shane MacGowan. The Irish musician took to Instagram on Friday to post an emotional message to the Nothing Compares 2 U singer, who died aged 56 in July after a long struggle with mental illness. Sinead’s tragic death was followed by the passing of The Pogues frontman Shane MacGowan on 30 November, who had also suffered from poor health for several years after a successful entertainment career. “Happy Birthday Sinead,” Imelda captioned a photo of her with the l…