Singer-rapper Justin Timberlake hangs "upside down" to prepare himself for his concerts.
The 32-year-old is said to have a set routine backstage before his gigs, which includes two hours meditation and a ban on talking, reports femalefirst.co.uk.
Speaking to The Sun on Sunday newspaper, a source said: "Justin is really strict about routine before his gigs. He believes keeping talking to a minimum and meditating gets him 'in the zone'."
"The hanging upside down bit gets his heart rate going as last-minute preparation," the source added.