The R&B hitmaker, 38, split from Paula Patton, his wife of nine years, in February last year (14) and he has been dating 20 year old Geary since late 2014.

They made their first red carpet appearance together at the high-profile French festival as they attended the popular de Grisogono party at the Hotel du Cap.

Thicke surprised guests at the bash with a short set, and even invited Geary on to the stage as a backup dancer while he performed his hit song, Blurred Lines.