British singer-songwriter Mika was traumatized when his sister Paloma, one of four siblings in a close-knit family, fell 50 feet from a window and was critically injured. Paloma, who designed the covers to Mika’s first two albums, was expected to die. The accident took place in 2010, and Mika refused to work on his music for nearly a year, while she recovered. “She had her body completely reconstructed,” said the 29-year-old Lebanese-born glam-pop vocalist, a week before the start of his American tour, which includes a stop Monday at the Great American Music Hall. “She was wheelchair-bound for almost a [...]