There are 5.1 million registered voters in Los Angeles County, and 118,522 of them did not appear on the rosters for Tuesday's primary.
L.A. County Registrar Dean C. Logan told the Los Angeles Times that their names were accidentally left off the rosters due to a printing error. Logan apologized for the "inconvenience and concern this has caused," and said his office is trying to figure out why this happened. The error affected 2.3 percent of the county's registered voters — including some celebrities — and 35 percent of its 4,356 precincts.
Those voters weren't out of luck, though — they were still able use provisional ballots, which are verified by vote counters.