Pre-recorded vocals of (I Got That) Boom Boom on Onyx Hotel Tour?

[AshleyButterflyRemix23]

Hey guys, Don't you ever think the vocals in the performance of (I Got That) Boom Boom from Onyx sound actually pre-recorded? I just made a mic feed version of this and the vocals in the performance sound little more different than the actual studio track. Take a listen to the video:

 

Do you think the vocals on IGTBB were pre-recorded for the tour? Tell me your thoughts?

[Kevney]

this isnt real. lol. 

it's a pretty good fake though

[King B.]

Still waiting for the undoubted version from the show

[G-unit]

In my opinion no, sounds like the album version

[Kevney]

i love this concert and was gonna watch it again today