Popsugar Celebrity Celebrity Instagrams Britney Spears Doing Backflips Justin Timberlake Song 2018 Britney Spears Is Doing Backflips While Listening to Justin Timberlake — What Year Is It Again? 22 October 2018 by Karenna Meredith First Published: 20 October 2018 View On One Page Photo 1 of 7 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 1 Previous Next Start Slideshow Celebrity InstagramsCelebrity BreakupsJustin TimberlakeBritney Spears