Okay a bunch more i found on youtube...
A cover of Vince Dicolas ESCAPE, Live Performance BY NEXT OF KIN
(This one is so amazing!)(Must SEE)
http://youtube.com/watch?v=VLlMUk2mE8E
Evil Decepticon Theme
(Vince DiCola's unused Evil Decepticon Theme)
http://youtube.com/watch?v=tZzYGtx4kuA
Shia LaBeouf, Megan Fox, Tyrese Gibson and Josh Duhamel break out their renditions of the "Transformers" theme song! Plus, the cast tries to sell the film in 20 seconds.
(I'm very dissapointed in Shia and Megan... They don't know anything about the film they are playing characters for v_v. Tyrese Gibson did us some justice i must say!)
http://youtube.com/watch?v=Az_TYNRD5Tc
BotCon 06 - Marching Band
http://youtube.com/watch?v=HzNqXLN0Dv0
Sentai Rock Band - Transformers Theme @ AnipĆ³litan 2006
(Another female vocalist on the Lion Theme)
http://youtube.com/watch?v=P8QtXlxwvxU
Time Symmetry - Transformers
(I think it is the same female vocalist)
http://youtube.com/watch?v=Z4QAJPQpA6I
TRANSFORMERS MOVIE THEME REMIX by DENSE MODESTO
http://youtube.com/watch?v=639szF46gFg
Transformers Breakdancing
http://youtube.com/watch?v=NSntFa91ZaQ
Transformers - Unicron's Theme on piano
http://youtube.com/watch?v=-bCz-qzAlJU
Transformers Unplugged
http://youtube.com/watch?v=VREr4AJROug
Linkin Park - What I've Done (piano cover)
http://youtube.com/watch?v=gIFZkI01Y4s
'Transformers' by Tim Kamps
(XD..funny)
http://youtube.com/watch?v=AIRbxVuhz8s
Transformers studio theme
(Rap... Explicit Lyrics)
http://youtube.com/watch?v=vE0YsOUwuLE
Transformers (Teaser Instrumentals)
http://youtube.com/watch?v=vl7w635OAF8
Transformer Music Video - Maja
(Another Rap one)
http://youtube.com/watch?v=MNh11uWJkAQ
Bay's Touch - Transformers soundtrack
http://youtube.com/watch?v=wLP8o_Jbqxo