25. James Franco and Anne Hathaway Hosting (2011)

The pairing of James Franco and Anne Hathaway as hosts was widely panned as one of the worst in Oscars history. Franco appeared disengaged and barely tried, while Hathaway over-enthused to compensate. A particularly awkward bit saw Franco dress as Marilyn Monroe, adding to the disjointed energy of the night.
Critics and viewers cringed at the mismatched chemistry and forced bits that never landed. The telecast became a cautionary tale about poor host pairings.