[Verse 3: B.o.B]
I watched my whole life change in a couple of years
Who woulda ever thought I would have caught the world by the ears

from B.o.B – Where Are You (B.o.B vs. Bobby Ray) Lyrics on Rap Genius

Meaning

His fans/friends are wondering where he went (Title: Where Are You). This verse is B.o.B answering their question and explaining himself to his fans.

He tells his fans that so much has happened to him and he was surprised at first, that his sound was so popular.

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