You apply online and if they like your application you can be called in for 1-3 interviews before being asked to join the team. During the interviews you can either be alone, or with a small to large group of people, especially if it's for the holiday season. Best advice is to apply for a summer gig or holiday gig.
I applied in-person. I interviewed at lululemon (London, England)
Interview
Relatively easy interview, focusing more on your personality and working attitude. The staff there are pretty friendly and give you so much positive energy. The whole process was quite enjoyable
iI had a group interview with 8 people. The interviewers were very friendly and it was a very relaxed atmosphere. They asked questions popcorn style and everyone got a chance to answer.
Interview questions [1]
Question 1
Tell us about a time that you made someone feel included.
Expect 2 group interviews with 6-10 candidates per group. Be prepared to share specific stories regarding conflict resolution, receiving constructive feedback, your favorite coach/boss, your biggest accomplishment, etc. Come dressed to impress with your favorite lululemon outfit and be prepared to sell it!