We double (trouble) bubble (bubble) bubble (bubblin hot)

from The Roots (Ft. Yasiin Bey) – Double Trouble Lyrics 4 on Rap Genius

The “double trouble” idea is a tribute to an earlier routine of that name. See below for more details

As mentioned in the song description, this tune originally featured a then-little-known Talib Kweli. Questlove recalled in the TFA liner notes what happened:

Initially, Talib Kweli laid down some vocals as well, but when the song was formatted there was only enough bars for two mc’s, and Black Thought insisted on doing some Run-D.M.C. ‘85 tug of war style

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