She's always been known for playing her personal life close to the vest, but 71-year-old Aretha Franklin is obviously having some medical issues: she's been forced to cancel two upcoming shows on May 20 and 26. R&B star Janelle MonŠe has been called in to replace The Queen of Soul, or to attempt it, anyway, for her upcoming show with the Chicago Symphony Orchestra, citing merely "doctor's recommendation for treatment." Connecticut's Foxwoods Resort Casino, meanwhile, told Reuters only that her upcoming show was "canceled for medical reasons." Ever since Aretha canceled an entire tour three years ago, rumors have run rampant about what her issues might be; the most popular suggestions are pancreatic cancer and lap-band weight loss surgery. Franklin is still scheduled for June performances in Canada and Michigan.