Applied in-person. I was a student at the time and told that they actively discouraged students from applying, because they preferred someone interested in Sephora as an ultimate career. If you are applying as a student, I would give them a pretty open schedule and then see what they say.
I applied in-person. The process took 1 day. I interviewed at Sephora
Interview
I went into sephora just to hand in my application and resume and ran into the manager and had an interview on the spot unexpectedly. I was just running errands that day so had no makeup on... bummer.. So be prepared! It was "too" informal and casual, though.
Interview questions [1]
Question 1
Typical questions e.g. Why sephora? What's your goal in your life? How would you deal with a certain situation? ect.