Britney Spears has fuelled marriage speculations after she was spotted wearing what looked like an engagement ring over Christmas weekend. The blond singer, who has been seeing her former agent, Jason Trawick, since over a year had a huge smile on her face as she posed with Santa and her sister Jamie Lynn for a picture to put up on a social networking site. Her left hand, which was on her knee, revealed a silver band around her engagement finger. Ho ho ho, Merry Christmas tweethearts, Britney posted alongside the photograph. While the 29-year-old pop star has had an on-again, off-again relationship with Jason, 38, for over 18 months, sources close to her say that the couple is now seriously contemplating walking down the aisle. The rumours were fuelled further when they were seen spending time with Trawicks family before heading to Louisiana for Christmas with Britneys family . TOI