DJ Hero 2

Upon completion of empire mode you will have roughly completed 10 or 11 of the DJ battle mixes needed for this achievement, Which means you will need another 7 or 8 mixes to go before it will pop.

Now these mixes won't appear under your normal song search, instead they only appear under the Battle Mode option in the menu or the DJ Battle option under the Xbox Live tab,

If you have two turntables then this is easily boostable by yourself, but if you feel like a challenge then hit up online play.

Just remember to check your Rep screen then Achievements to find out which songs you still need to play in order to advance.

I recommend you beat Empire Mode before reading this guide, as that is how I am going about this achievement.

After completing all the DJ Battles in Empire Mode, you will have 6 of 17 Battle exclusive mixes already completed. These will be the remaining mixes you must play to pop this achievement.

1) From the Main Menu, go to Battle -> DJ Battle
2) Press and sort songs by Title A-Z.
3) Add the following songs to a setlist by highlighting them & Pressing :

Sparfunk / D-Code - Apocalypse
Dizzee Rascal & Armand Van Helden / The Prodigy - Bonkers / Omen
Sam Cooke - Chain Gang
Tiesto vs. Diplo - Come On
Lil' Wayne / 50 Cent - Go DJ / In Da Club
LL Cool J / Chic - I Can't Live Without My Radio / Good Times
House of Pain - Jump Around
Naughty by Nature / Jackson 5 - O.P.P. / ABC
Major Lazer ft. Vybz Kartel / New Order - Pon De Floor / Blue Monday
A-Trak - Say Whoa
New Boyz - You're a Jerk

Choose Beginner difficulty (or play them legit on any other difficulty) and let the mixes play. This will take around 40 minutes total. If you're going at this with 2 profiles, only Player 1 will unlock an achievement. I tested this myself. Also, Player 1 will unlock the achievement as soon as the mix is over, regardless if the setlist still has remaining songs.