Piquete literally translates to "picket" or "sting", but in urban Latin American slang, especially in reggaeton and trap music, it means "swag," "style," or "flair."
In Cris MJ's song, when he sings "Tiene piquete de Francia," he's not talking about a French sting. Instead, he's complimenting someone's sophisticated and fashionable style, suggesting they have a chic, French-inspired look. It's a great example of how common words take on new, trendy meanings in modern Spanish music.
Cris MJ opens "Jet" with a shrug at the whole world ending — "A veces siento que el mundo ya se va a acabar" ("Sometimes I feel that the world is about to end") — and then spends the rest of the song proving he's not losing sleep over it. He's on a private jet with someone who only talks to him in English, he's buying himself a Rolls-Royce ("Me compro un doble R" — "I buy myself a double R"), and he still makes time to hit the gym: "mi salud la tengo que cuidar" ("I've got to look after my health"). The second half repeats the same verses almost word for word, like he's running through the same flex twice to make sure it still lands.
Underneath the jets and the cars there's one line that cracks the surface: "Que no me responda a mí me duele" ("That she won't answer me hurts"). All the money in the world doesn't stop getting left on read from stinging. That's the tension the song sits in — the lifestyle is real, but so is the person he can't quite pin down.