Usher and his pregnant wife Tameka Foster are said to be living apart.
The couple, who are expecting their second child, married on 1 September last year.
But insiders claim they have been separated for months - despite being snapped together at Usher's 30th birthday party on 14 October.
Last year the couple - who have a son Usher Raymond V, 1 - cancelled their wedding a week before it was due to take place. They tied the knot at a later date.