Whitney Houston's return to music has been an uphill battle for the recovering singer. Her tour dates in both Australia and Asia were scrutinized by her fans and the media for her failure to hold the stellar vocal range she once held, and now it appears that Houston has another problem.

A statement from her reps on Monday, April 5, stated that the singer is following a doctor's order to delay the Paris kickoff of her European tour.

"Whitney is suffering from an upper respiratory infection and after consultation with her doctors has been advised to postpone her performance," a statement from promoters acknowledged. "Whitney and her band apologize that the show has to be rescheduled on such short notice."

This is the latest problem on Houston's world tour in support of 2009's 'I Look To You,' her first album in seven years. Earlier performances on the tour received negative reviews which led to concerns about Houston's health and former drug addiction issues, but her publicist Kristen Foster denied any health problems alleging that Houston is in great health and having a "terrific time on her tour and with her fans."

With her opener in Paris being canceled, Houston will launch the European leg of her tour in Manchester, Britian on Thursday, April 8. A new date for the Paris show will be announced at a later time.