The 30-year-old 'X Factor' judge and Trawick announced their engagement in December last year. They have yet to announce a date for their big day, although there have been reports of a winter wedding.
Earlier some reports suggested that all is not well between the pair, with one website reporting the wedding has been postponed, reported Daily Mail.
However, Spear's publicist Jeff Raymond has brushed off the reports as "desperate" insisting the claims are untrue.
Raymond did not give details of when the wedding would take place.
Trawick, Spear's former agent, has been credited with helping the singer turn her life around in recent years following a very turbulent spell which saw her suffer a breakdown in the media spotlight.
The couple confirmed they were dating in May 2010 - and that they had ended their professional ties in order to focus on their personal relationship.
Spears has two children, Sean Preston, aged seven, and Jayden James, six, with her ex-husband Kevin Federline.
