Remember the interview in Mexico. In the middle of it, she pointed to his sneakers and said "I like snickers" (the way she pronounced it). Not realizing what she was referring to, he thought he was "exposed" and covered up.
Later on, she did a second interview. In this interview, she repeated the comment, only this time saying: "I like sneakers." He pretended to be embarrassed again. It was a fun moment.
Anyway, this shows that she has always been open to endorsing the "right" product(s). Yelle had a sneaker commercial at this time and it was very positive (and also probably very lucrative) for her.
If Alizée had managed to land a similar contract not only would it have been lucrative but it would also have provided a lot of free publicity for her.
