U.S. fans of Aretha Franklin won’t be graced with the presence of the legendary soul singer later this month after the singer announced this week the cancellation of two upcoming performances due to unclassified health issues.

The 71-year-old canceled her May 20 concert with the Chicago Symphony Orchestra and her solo May 26 performance at the Foxwoods Resort Casino in Connecticut after a doctor’s recommendation requested the singer take one week off in late May for medical treatment, Reuters reported Monday.

Foxwoods spokesperson Dale Wolbrink confirmed the news, saying Franklin's Connecticut show was “canceled for medical reasons.” Wolbrink said the “Respect” singer’s show date will be filled by fellow singer, R&B artist Janelle Monae.

Franklin’s upcoming summer concerts dates -- June 22 at DTE Energy Music Theatre in Clarkston, Minn.; June 26 in Confederation Park in Ottawa, Canada; and June 29 in Place des Arts Montreal, Canada -- are all still scheduled to occur.

This isn’t the first time the singer has canceled performances due to medical reasons. Frankin’s medical treatments lead to the cancellation of multiple concert dates and appearances in 2011, according to "Today." After undergoing an unidentified surgical procedure in 2010, Franklin reportedly told Jet magazine that she was experiencing sharp pains in her side, causing rumors to circulate that the longtime singer was being treated for pancreatic cancer.

The artist released her last album, “Knew You Were Waiting: The Best of Aretha Frankin 1980-1998," and her latest single, "I Knew You Were Waiting (For Me)," costarring George Michael, last year.