Just Dance 3

Get all Styles with the same player during one game session

OK I'll start by pointing out that as the achievement description says,this has to be done in one session with the SAME player,by the same player what it means is all style awards need to be won by the same on screen player or colour,it wont count if you get 7 styles with one colour and 2 with another,they ALL must be earned by the same player/colour,with that said it doesn't matter which player/colour it is
Be aware that not all colours are available on single and double choreographers when dancing alone or as a pair so get more dancers/props in so you can dance as the colour you want on these ones.

This can be done on short dances if you like.

Props will also work as extra players should you need them,be it a jacket hanging on a stool or vacuum cleaner,anything you can make a humanish shape from,get kinect to recognise them in the screen where you select difficulty,if you're having trouble registering them pick one up so it matches your colour,then put it down and hide behind it,move away and it should stay,just stick with it until they're all registered,you can use 4 props and just sit back and watch,i got big band theory bronze and silver using it(credit goes to Pinicus for the prop ideas)


So the styles you need to earn in a single session with the same player/colour

Multi-player(these styles require 2 - 4 players to obtain)

Quartet - Everybody danced the same (4 players)

Trio - Everyone danced the same (3 players) can be gotten with 4 players if 1 dances different to rest

Twins - Everyone danced the same (2 players) again can be gotten with 3 or 4 players if 2 people dance differently

All these multi player styles are easiest to get on a song with a single choreographer,i've found the best song to achieve these is Barbara Streissand (credit goes to Pinicus for this)

DaddyLongLigs points out in the comments that these multi-player styles are based solely on score and not how the players dance, So if you are struggling to get any of these, dance with the required number of players and when you hit 3 stars and walk away and have any other players do the same, That way each player will end up with around the same score, earning them the required style. Will work for Twins, Trio and Quartet

Single player styles (These styles can all be obtained by a single player,however if you have 4 players use them as you'll get more styles per song increasing the chances of any player obtaining them all)

In rhythm - You danced in rhythm(just dance well)

Creative - You danced your own way(kinda follow the choreography buy put your own moves in here and there)

Energetic - You put a lot of effort into your moves(big exagerated movements)

Smooth - You danced well without breaking a sweat(as little movement as possible but still getting the moves,opposite of energetic)

Wild - You shook and jumped about the most(jump around,wave your arms,like it says be wild)

Lazy - You need to try harder(make sure you pass a few moves here and there but don't really try,standing still for the whole song sometimes means you don't get a style so do a little)

It's easier to get these styles using multi choeregraphy songs as everyone is dancing differently so can possibly all get different styles,i got all these styles on the song This is Halloween(again credit has to go to Pinicus for this song choice)

Get a pen and some paper,write down the player names or colours then write the results of each dance beside the players colours,that way you'll be able to track who has what and who is closest to getting all the badges,i had red and purple on 8 styles each while red and green had 5 each,i'd earned every style but not with the same colour,so it's really worth writing them down so you can keep track.

Good luck,Any questions feel free to ask

Edit- it's been stated in the comments by moogless and PDwizzle that all the multiplayer styles are NOT required for this achievement, although myself and others required all styles, So it's possible you might unlock this without the all multiplayer styles, PDwizzle states he got it with just 2 players, so try getting the single player styles and the twins style,if that doesn't get you the achievement you'll need to go for trio and quartet

Boots Orion also notes that they were able to back out the songs menu to select short songs without losing the session progress, so if you accidently back out don't sweat it,your progress should be safe