Trauma

Bam:

Has Trey Songz done a song with The Isley Brothers? Hell no.
Moreover, the one characteristic that puts R Kelly in a different category than Trey Songz IMO is the fact that he's been making music for two decades and he's still popular.
If it weren't for these two factors I would agree with you.
P.S. A comparison like Trey Songz/R Kelly is completely up for debate. But a comparison between Lil Wayne/Big L, I'm not so sure.

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A mi no me importa nada
Para mi la vida es un sueño