If you mean the dancers on tour, the girls are Lexie Contursi, Rachael Markarian, Leah Adler and Ashley Ashida. Brandee Evans was also on the tour until May. Lexie and Brandee were both in the California Gurls music video too.
Over his career Justin Timberlake has had many female backup dancers. In order to discover the names of the backup dancers the video or concert would need to be known first.
Justin Timberlake has several male backup dancers, but it is not known what their names are. One of his female dancers is named Dana Wilson. The dancers on his 20/20 Experience World Tour are under a union contract.
The back up dancers on the Dancing with the Stars tour are names in the press releases. In 2014, Derek and Julianne Hough will be touring and dancing with the tour.
The show has a range of back up dancers that are used amongst the acts - they weren't his own specific dancers. Their names are unknown as they are just part of a company that is used.
Carey Romero .. Jaz Garcia... JC Brett..+more > for best of \Both worlds
Alex and Alexander Takeisha and Lakeisha shaniya and zaniya
kupal.gago.bubo.
?
there are so many. i don't know the names but several of them were ex-gang members! the others were just good dancers.
Mark Ballas
it is Myrna Sawmill
They are backing dancers - their names are unknown.