Hanson says they haven't heard good covers of 'MMMBop' because they're usually sung wrong - Los Angeles Times

Brace yourself for some serious '90s nostalgia: Hanson's catchy tune "MMMBop" turns 20 on April 15 and the band dropped a major truth bomb about the song -- people have been singing it wrong this whole time.
When asked if Hanson had heard any good covers of their hit single MMMBop over the years, they said no because people usually sing it wrong.

Hanson Says Covers Of 'MMMBop' Are All Wrong - uInterview

If You Give a (Fan) a (Ticket): 2016

Interview with Hanson about MMMBop!

WHO Issue 10, 2022 (Digital)

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Hanson: 'We haven't ever heard a good 'MMMBop' cover