R&B singer Bobby Brown has postponed his upcoming Australian tour so he can be by his daughter Bobbi Kristina Brown's side as she remains in a critical condition in hospital.

The My Prerogative hitmaker was due to perform four dates Down Under in March (15) but all concerts have been axed until May (15) so Brown can stay in Georgia and visit his 21-year-old daughter.

She remains in a medically-induced coma after she was found unresponsive in a bathtub at her home in January (15).

A spokesperson announced the news on Brown's Facebook.com page, writing, "Bobby Brown's upcoming Australian Tour featuring special guests Treach and Kay-Gee from Naughty By Nature, has been postponed to May to allow Bobby Brown to spend further time with his family."

Brown's sister was reportedly admitted to a hospital on Sunday (22Feb15) after suffering a stroke.