Happy

"Happy" by Pharrell Williams is featured on Just Dance Epic Hits.

Classic
The classic dancer is a man wearing an amaranth purple colored hat, a pair of light blue sunglasses, a yellow sweatshirt with a big black smiley face on it, under that, an amaranth purple shirt with its end shown underneath the sweatshirt, a pair of dark aqua pants which match his dark aqua colored glove and lastly, a pair of amaranth purple shoes.

Backup Dancers
The two males that appear in the background towards the start of the song are wearing boxes on their heads. They are blue and highly detailed. They are wearing jackets. They look similar to Video Killed the Radio Star.

There are also two girls wearing pink jackets and have pineapples on their shirts. One of the girl's hair is poofy and resembles the Ghostbusters sweat version. The other one looks similar to American Girl and Mr. Saxobeat, in style of hair.

The panda from C'mon makes a reappearance. However, he looks different this time. He is wearing a red/yellow headband, a radio around his neck, and red sneakers.

P1
P1 is the lead dancer. His outfit is mainly black - he has a black jacket with a pocket, black pants and gray shoes. His shirt is white and he has a black tie.

P2/P3
P2 and P3 are the backup dancer. They are male. They have a short-sleeved white shirt, black bowtie and buttoned gray vest. They also wear black pants with gray sneakers. P2 is clean-shaven whereas P3 has a beard.

Classic
The background consists of real life shots (akin to Gentleman) with some animated effects. The real life shots are mostly a school hallway, the underneath of a concrete bridge, a residential area and a pool. There are various backup dancers dancing along to the song (see above for background dancers).

Sing Along
The Sing Along background is the same as Starships’ Charleston Mode's background, aside from two microphones which have been planted for the dancers.

Classic
There are 3 Gold Moves in the Classic routine, all of which are the same:

All Gold Moves: Clap once with both of your hands while walking to the left.

Sing Along
There are 3 Gold Moves for P1 and 2 Gold Moves for P2 and P3 (both of which are the same) in the Sing Along routine:

Gold Moves 1 and 2 (P1): Straighten your shirt.

Gold Move 3 (P1): Point to the sky.

Both Gold Moves (P2 and P3): Push away.

Community Remix
Happy is the first song to have a Community Remix. The full remix was shown at the Ubisoft live stream. Just Dance sent about 15 people the full choreography for the people to send to Just Dance so that his/her part gets featured.

The following are featured:
 * Carl_Natassia [USA]
 * JennySmilez [Australia]
 * MonoFreind6 [UK]
 * Party2Rock [USA]
 * Dancelicious77 [USA]
 * Melanie1988 [Belgium]
 * XXJohnXX [USA]
 * Hermanitas [Mexico]
 * ALEXANGEL96 [USA]
 * SHOWT1M3 [Belgium]
 * MAXPOWER999 [Canada]
 * HappyJENNY [USA]
 * FaTCaT [France]
 * BLUEBIRD606 [USA]
 * ALIC14 [USA]
 * ESTRELLITA [Spain]
 * Sammy3 [Italy]
 * JUSTROX [USA]
 * Mo Chocolate [USA]
 * 1MORERABBID [Ubisoft]

Trivia

 * Happy is the second song by Pharrell Williams in the game.
 * The background for the routine was used in the teaser trailer "#June9 - Just Dance".
 * The dancer is meant to look like Pharrell Williams. Also, a similar (or maybe the same) coach is in Blurred Lines, which is a song that is also partially made by Pharrell.
 * The background for the Sing-Along is very similar to that of the Starships (Charleston).
 * Happy (Sing-Along) is the only trio which the lead dancer is P1, instead of P2.
 * The backup choir was inspired by some scenes in the music video.
 * The panda from C'mon appears in the background.
 * Happy’s Community Remix uses the same layout as Uptown Funk’ Community Remix.
 * During the second verse, the left back-up dancer does not have painted legs unlike his arms.
 * The second bridge and the final chorus of the song are removed in-game.