Floyd Mayweather Jr is thought to have veneers though he's never spoken about it in the media.
Many of the top celebrities and stars are known to have veneers and other cosmetic changes to give them the look they are after.
"Money" Mayweather himself has almost perfect teeth and its been the talk of different gossip sections of blogs and websites as to who did his teeth.
Dr Lee Gause of Smile Design Manhattan is credited with doing work on Mayweather (and being the supplier of his match mouth-guards) but we don't know if Dr Gause has given him veneers too.
Gause has worked on lot of other stars we see including Wiz Khalifa, A$AP Ty and Ron Artest.
Veneers are a thin layer of porcelain shaped to fit over your teeth like false fingernails fit over natural nails. They can be made the color, shape and size that you want them to be to fit your perfect your smile.
Some of todays celebrities get it wrong and go too big while others don new smiles that seem to change everything. If veneers are done well they can look very natural and healthy and make crooked, missing or chipped teeth look intact.