LAS VEGAS —  Toni Braxton won't be returning to the stage at the Flamingo Las Vegas until at least next month.

Hotel officials say Braxton's show will remain dark this week while the 40-year-old Grammy winner has more medical tests following her April seventh hospitalization with chest pain.

Add a previously scheduled two-week break, and Braxton is due to resume her show at the Flamingo Showroom on May sixth.

The Flamingo is offering refunds for canceled shows.

The exact cause of Braxton's chest pain hasn't not been made public. She has been treated in the past for pericarditis, a viral inflammation of the heart.