Pop singer Whitney Houston has postponed the European leg of her current tour as she recovers from a respiratory illness.

It was initially believed that Houston would just miss her first four shows in Paris, but it now appears that she’ll miss three more shows in the United Kingdom, signaling that the ailment is worse than originally thought.

“Doctors visited Whitney late last night in Paris and confirmed that she was suffering from an upper respiratory infection,” her publicist in a statement issued April 7. “Upon medical advice Whitney has been advised that she cannot perform to allow her time to recover.”

Houston’s “Nothing But Love” tour is her first in years and was meant to signal her comeback to the mainstream. However, it has already been marred by negative press.

Houston received poor reviews after giving lackluster performances in Australia which prompted many to wonder about her well-being. At the time, a Houston representative issued a statement to combat the rumors, saying that “Whitney is in great health and having a terrific time on her tour and with her fans.”

Houston has moved two Manchester, England shows to the end of the tour, on June 17 and 18. Her Glasgow, Scotland concert has been rescheduled to May 1.

The European portion of her tour is expected to begin April 13 in Birmingham, England.