>> today we have a bbl, bbl, implant exchange, bbl bam. >> bbl, bbl, implant exchange, bbl, bam. awesome. >> reporter: into the o.r. where cynthia is halfway through her transformation. >> all right, so this cheek is done. look how tense it is. i can't get any more fat out of there. >> reporter: dr. miami's popularity only seems to be growing. >> here are your finalists for best snapchatter of the year -- >> reporter: he came in second, losing to dj khaled. >> maybe next year. >> you never know. >> reporter: while snapchat may have made him famous, his patients say the work speaks for itself. ten days after her surgery, cynthia's backside has been transformed. >> how nice does that booty look now? >> reporter: thanks to snapchat, it's there for everyone to see. >> so we're all done. look at this booty. i'm going to show you the before i'm going to clean it up and show you the before and after pictures. >> reporter: for "nightline" i'm rebecca jarvis in miami. >>> next, a wall crawler climbing the side of a building in new york city. police reeling him in after nearly three hours.

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