Doug Williams
Shaq featured comedian Doug Williams on his All Star Comedy Roast to take some jabs at footballer Emmitt Smith. Williams gets about three jokes into his set when Jamie Foxx starts going at him, mocking all of his punchlines and even telling him to get off the stage. Foxx later apologized, but Williams couldn't come back from the roast.
Ian Watkins
The Lostprophets singer should never ever make a comeback. Ian Watkins released five studio albums up until his 1997 arrest. The charges included taking and/or making indecent photos of children and one count of extreme bestiality. Time to take those Lostprophets songs off of your playlists.