Wondered this too and looked up how you can attend Cannes, apparently it is only for film professionals (so you have to be associated with a film - producer, actor, director etc). If you're not, you can apparently blag it by:
- Our local insiders in Cannes have given us this top tip for how to get a ticket. Firstly, dress up in your best evening wear: for men, this means black tie, and for ladies, a ball gown. Then, head to the entrances of the Palais des Festivals – and get ready to wait. The actors and film-makers are all given a certain amount of tickets to get into the Cannes Film Festival, and are penalised if they don’t use them all. This is when you come in – sometimes they give these tickets away to well-dressed people waiting for their chance at the entrances! Many attempting this will hold a sign reading “one ticket please!” to get noticed more quickly.
Aside from a straight up blag, you can get in 'officially' through one of the 6 accreditation types. This includes press accreditation - maybe as a blogger she counts as press?
https://www.cannesguide.com/cannes-festival-guide/attending-the-cannes-film-festival/ Alternatively maybe her family money bought her access to one of the accreditation types.
She's never been in any movies or associated with them - her IMBD lists MIC and The Wright Stuff as a panellist only lol. So this seems like either a blag or a paid her way in job.