In this video from last year's shoot in Guilin, China you can get a glimpse into how Derek makes his magic, even if step one is "Hire Jessica Gomes."
Swim Daily, Jessica Gomes Up-Close
GALLERY: Jess takes China
Up Close with Jess Gomes
***MORE CHINA NOSTALGIA: Outtakes BTS Shop the Look Swim 2013 on SI.com