Brandy is flexing her Rap gravitas and has drawn on Jack Harlow‘s ‘First Class’ to do so.

As widely reported, the rising rapper made headlines after revealing that he did not know the singer and her brother Ray J were siblings. The remark ignited a wave of debate online – with the likes of Jackée Harry and India Arie weighing in.

Now, B-Rocka has responded musically.

Full story after the jump…

Some may recall that Brandy’s initial response was a declaration that she would “murk” Harlow “in a rap at 43 on his own beats.”

Now, she’s delivered on her promise of putting her own spin on the #1 hit.

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