So Far Away, a song by Carol King and one of the singer's favourites, was played after the service.
Marc Ronson, who described Ms Winehouse as "like a sister" to him, was among the attendees.
Kelly Osbourne was also present, wearing her hair in a beehive in tribute to the star's iconic look.
Fans and photographers surrounded the cemetery as well.
It is understood that the service was followed by a cremation at the Golders Green Crematorium in Hoop Lane. The family are also expected to sit shiva for at least two nights.
