Everything I ever said
Everything that I have done
Tryna show 'em it's my time
Building mansions in my mind
Now thats all so yesterday

from B.o.B (Ft. Trey Songz) – Castles Lyrics on Rap Genius

Meaning

Fame changes people, but B.o.B embraces this change and has begun to blaze his own trail. Now he can actually build those houses he had always imagined.

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