This season, Horner's work leading Red Bull has been overshadowed by allegations regarding his conduct; the 50-year-old has always denied any wrongdoing.
In February, a female Red Bull employee's grievances regarding Horner's alleged inappropriate behaviour were dismissed. Since, the employee has been suspended on full pay and appealed the decision to clear Horner.
Geri Halliwell drops 'Horner' from name
Halliwell was seen by Horner's side at the Bahrain Grand Prix, the season opener and first race since the accusations became public.
Now, in a new video for Dior, the singer introduces herself as Geri Halliwell, without the Horner name.
"'C'est moi Geri, Geri Halliwell," she says, which in English means, "It's me, Geri, Geri Halliwell".