Originally posted by Billboard

It has been 16 years since "...Baby One More Time" hit No. 1 on the Hot 100. (Spears' advice for her 17-year-old self? "Stay strong.") The Vegas routine seems to suit her well. On show nights, she'll spend an hour getting her hair and makeup done while rocking out to Taylor Swift's 1989 ("It's so much fun -- 'Out of the Woods' is a good one") before heading downstairs for a prayer with her team.