There are many pirated copies for sale on eBay. Be careful when you buy CDs and keep your eyes wide open. If there are any "Gold" or "HDCD" CDs, these might be bootlegs from Asia. In Asia bootlegs are very common and are sold everywhere. Christina Aguilera is signed to the record label RCA and on the cd there is the label "Universal" printed. The CDs come in an extra nice printed picture slip case. Also keep an eye on the track list.
Christina aguilera - Move you body - CD-E1007 - Disc vol.B

01 Turn it up (Intro)
02 Case of the ex
03 Ride & shake
04 That's why I wanna eight
05 Pusscats
06 The best of me (featuring jadakiss
07 Lie detector (featuring beenie man)
08 How you gonna tell me
09 Gandma says(skit)
10 Takin' me over (featuring left eye)
11 Now or never
12 Fear of flying
13 Flying
14 Can't believe
15 No tears on my pillow
16 Man in my life
17 Lay makmalade
18 Nobody wnts to be lonlely
19 Genie in a bottle
20 What a girl womts
21 Reflection


Here you can see there are tracks that where not preformed by Christina Aguilera. These tracks are from Mya (University Music Entertainment/Interscope Records).
Also take a look at the spelling of the tracks. There are many typing/spelling mistakes and this is common.