Summer

"Summer" by Calvin Harris is featured on Just Dance Epic Hits.

Classic
The dancer is a woman with jade green hair, yellow sunglasses, a gold ring, gold diamond-shaped earrings, a pink sports bra with gold straps around it, a jade transparent skirt with dark green (seen to be green from the skirt) sequin underwear, and pink lace up heels.

Sweat
The fitness dancer is a man with short black hair and a beard, a green and black shirt with some yellow and blue stripes, and blue and black pants with green triangles and yellow stripes, black socks, and yellow shoes.

Classic
The background has shiny vertical lines that have blue and yellow triangles moving around in them, thin horizontal lines, and highlighting circles.

Sweat
The dancer is standing on a marathon track (the track in Just Dance 2014 Sweat routines) that flashes in bouts of red and cyan. The numbers 4, 5, and 6 can be partially seen when the track is lighted up.

Classic
There are 5 Gold Moves in the Classic routine:

Gold Moves 1, 3, and 5: Move your right hand quickly in a semi-circle going to the right whilst taking a wide step towards the left.

Gold Moves 2 and 4: Touch your left leg with your right hand with force while kicking behind.

Sweat
There are 5 Gold Moves in the Fitness routine, all of which are the same:

All Gold Moves: Leap with your legs spread out and throw your arms in the air.

Trivia

 * Summer is the second song by Calvin Harris in the game.